The issue comes when low-grade inflammation becomes persistent or ‘chronic’, as it’s been identified as a precursor to diseases like type 2 diabetes and cardiovascular disease.

Recently, you might have clocked anti-inflammatory diets doing the rounds on social media, as a simple but effective way to bring levels of inflammatory markers back to baseline. 

So are there specific foods or supplements we should be loading into our shopping trolley to help combat low-grade inflammation? We took a deep dive into the topic, with expert help from Form’s nutrition expert Dr Adam. 

What is inflammation, and why should people be mindful of it?

Inflammation is a natural process involving an immune response triggered by damage, infection or other signals of stress. Acute inflammation occurs in response to infections (such as the cold or flu) or physical damage (like cuts or bruises). This intensified immune response is quite noticeable but typically subsides relatively quickly, usually within a few hours or days.

The type of inflammation people are generally more concerned with is chronic inflammation. This is a low-level inflammatory state that persists over time, possibly due to the overproduction of pro-inflammatory molecules, and can lead to detrimental effects on organs and body systems.

Chronic inflammation forms part of the pathophysiology of many common Western diseases, including cardiovascular disease, diabetes, and cancer, as well as more obvious immune-related conditions such as rheumatoid arthritis. Some also argue that ageing itself may be a consequence of chronic inflammation. It is therefore not surprising that inflammation is increasingly discussed as something to be ‘combated’, often through dietary change.

What role does diet play in inflammation in the body?

From a mechanistic perspective, dietary factors do influence inflammation. We know that certain dietary patterns are associated with a reduced incidence of so-called ‘inflammatory’ diseases, most notably the Mediterranean-style diet. In reality, the characteristics of most conventional healthy-eating guidelines are quite similar to this pattern. One could argue that this similarity may, in part, be due to the inclusion of specific foods that can mechanistically influence inflammation.

Are there specific foods that can reduce inflammation? If so, what are they?

Long-chain polyunsaturated fatty acids (LCPUFAs) are precursors for localised signalling molecules known as eicosanoids, which can be either pro-inflammatory or anti-inflammatory. In general, eicosanoids produced from long-chain omega-3 (n-3) fatty acids—such as EPA and DHA—tend to be more anti-inflammatory than those derived from omega-6 fatty acids (for example, arachidonic acid).

From a dietary perspective, EPA and DHA obtained from microalgae are commonly regarded as anti-inflammatory. In contrast, red meat and other animal products – and indirectly some seed oils – are sources of arachidonic acid, which may be associated with more pro-inflammatory effects.

Another important dietary group is polyphenols. These bioactive compounds are found in fruits and vegetables and are often linked to pigmentation. For example, strawberries, raspberries, and blackberries are particularly rich in anthocyanins. Dark leafy vegetables such as kale and spinach, as well as broccoli, certain nuts and seeds (e.g. flaxseeds), green tea, coffee, dark chocolate, and extra-virgin olive oil, are also excellent sources.

More recently, turmeric (or curcumin) has gained popularity as an anti-inflammatory ‘superfood.’ These compounds may act as antioxidants or help modulate the inflammatory response through various cellular mechanisms. 

What about foods to avoid, or foods that can cause inflammation?

Rather than focusing on individual foods, evidence suggests that certain dietary patterns are more conducive to inflammation. Most notably, these patterns involve a high intake of meat and dairy products.

We have already discussed the rationale for meat and animal products in relation to omega-6 fatty acids, but there are likely other explanations as well. These dietary patterns also tend to be lower in fruit and vegetables, which, as noted earlier, may offer protective effects. They are often higher in overall calorie intake, too.

Importantly, obesity, or high adiposity, creates a low-grade pro-inflammatory state in itself, something that is frequently overlooked. In practice, it can be difficult to disentangle cause and effect. For example, are diabetes and cardiovascular disease the result of a pro-inflammatory diet, or is it the obesity and adverse body-fat distribution that leads to inflammation? I would argue it is more the latter than the former.

Is eating an ‘anti-inflammatory’ diet a good idea then?

Yes – but perhaps not for the reasons it is often marketed. An anti-inflammatory diet typically resembles a Mediterranean-style dietary pattern, sometimes with an added emphasis on specific foods such as turmeric. As a result, it is usually higher in fibre, more nutritionally complete and micronutrient-dense, lower in saturated fat and added sugar, and lower in overall calorie density.

These diets also tend to promote weight loss or improvements in body composition because they are often lower in calories than an individual’s habitual intake, and they encourage greater awareness of food choices, which typically leads to reduced intake.

This behavioural component is how most diets work, particularly when the underlying rationale sounds appealing or scientific. The end result is that people feel better and become healthier – and regardless of scientific scepticism, it is difficult to argue against that outcome.

The post Ask Dr Adam: Are There Specific Foods or Nutrients That Can Reduce Inflammation? appeared first on Form.

Emerging research is beginning to suggest that this humble compound may do far more than just support physical strength at the gym, with intriguing implications for energy, ageing and even how our brains function.

So should we all be taking creatine to bolster our grey matter and potentially ward off cognitive decline? As ever, we turned to Form’s resident nutrition expert, Dr Adam, to weigh up the evidence.

Why the brain needs creatine in the first place

To understand the potential benefits of creatine supplementation, we must first revisit the role creatine plays in the body.

Creatine – more specifically phosphocreatine (PCr) – provides an ultra-rapid means of recycling ATP, the energy currency of the cell. By donating a phosphate in a single-step reaction catalysed by creatine kinase, one molecule of PCr can regenerate one molecule of ATP. This system can produce ATP around ten times faster than traditional glucose oxidation, but it is short-lived. After just a few seconds, creatine phosphate stores are depleted, meaning it is only effective for brief bursts of rapid energy demand.

The brain is one of the most energy-hungry organs in the body, consuming around 20–25% of our total metabolic rate. It is also the body’s priority glucose consumer – a key reason blood glucose is so tightly regulated to ensure a constant supply.

While glucose oxidation remains the brain’s primary energy pathway, it is now well established that the brain also relies on phosphocreatine. Not only does PCr support rapid ATP production, it also plays a role in regulating mitochondrial function and acting as a temporal energy buffer. High concentrations of PCr are found in the brain’s grey matter, particularly within the cerebral cortex and cerebrum, helping to keep the working brain energised.

What creatine actually does for brain function

Given both its role and its location in the brain, creatine has been linked to higher-level functions associated with the cerebral cortex, such as thought, memory, and language, as well as cognitive processes governed by the cerebellum, including the execution of complex, skilled tasks.

From a health perspective, PCr has also been proposed to play a neuroprotective role, although much of this evidence currently comes from animal research. These studies suggest creatine may reduce neurotoxicity and amyloid toxicity  – the latter being associated with the accumulation of beta-amyloid plaques that disrupt communication between neurons, a hallmark of Alzheimer’s disease.

Taken together, the mechanistic importance of creatine to brain health is compelling. But what does this mean in practical terms – and can supplementation actually make a difference?

Why boosting brain creatine isn’t as simple as muscle

A substantial body of research supports the benefits of increasing available PCr through supplementation, particularly given the finite nature of this energy system. However, the vast majority of this work focuses on skeletal muscle, where creatine is strongly associated with improvements in muscle performance, function, and mass  – especially when combined with resistance training and adequate protein intake.

Whether the same applies to the brain is less clear.

Skeletal muscle contains the highest concentration of PCr in the body (approximately 20–30 mmol/kg of tissue, or around 120 mmol/kg of dry muscle). By contrast, PCr concentrations in the brain are much lower, at roughly 5–10 mmol/kg.

The capacity to increase these levels through supplementation also differs. Muscle PCr can rise by 20–30% following supplementation, whereas increases in brain PCr appear to be far more modest. Even high doses of creatine (around 20g per day) may only raise brain PCr by an average of 9%, and this effect is most commonly observed in older individuals who may already have lower baseline levels.

Unlike muscle, brain PCr appears to be tightly compartmentalised and largely dependent on creatine synthesis within the brain itself, rather than uptake from circulation. This has led to interest in guanidinoacetic acid (GAA), a natural derivative of the amino acid glycine and a direct precursor to creatine. GAA may be more effective at increasing brain PCr, although continuous supplementation raises concerns around potential side effects and possible neurotoxicity.

That said, supplementation may still benefit the brain indirectly. Increasing PCr in muscle could support brain health through a proposed “muscle-brain axis”.

Does creatine really improve memory and focus?

Randomised controlled trials investigating creatine supplementation and cognitive performance tend to be small and short in duration. However, several systematic reviews and meta-analyses have attempted to synthesise this evidence.

The headline conclusion often cited is that creatine supplementation may improve certain aspects of cognition, particularly memory and attention. These effects appear to be more pronounced in older adults, which aligns with what we know about age-related declines in energy metabolism.

However, most studies involve healthy individuals, with relatively few participants aged over 60. Many trials are also considered to be of fair or poor methodological quality, and there has been criticism regarding bias and limitations within the collective analyses.

In short, while the findings are promising, more robust and well-designed studies are needed to draw firm conclusions.

There is, however, good evidence that creatine supplementation can help minimise the cognitive impact of sleep deprivation. These effects are likely mediated through changes in muscle PCr and function, influencing the brain via the muscle-brain axis – potentially through myokines such as irisin and BDNF, which can cross the blood-brain barrier.

Creatine as a potential therapy for brain disorders

Creatine has also been explored as a potential therapeutic agent in neurological and psychiatric conditions, including Parkinson’s disease, Alzheimer’s disease, and depression.

To date, two large clinical trials have produced largely disappointing results. One five-year study involving 1,700 individuals with Parkinson’s disease, supplementing with 10g per day, showed no improvement in clinical outcomes and was terminated early. Similarly, the CREST-E trial, which examined up to 40g per day in over 500 individuals with Huntington’s disease for four years, found no benefit in slowing functional decline.

More recently, however, a small randomised trial in Alzheimer’s patients reported promising findings. Supplementation with 20g per day led to increases in brain PCr alongside significant improvements in cognitive performance. Other research has also demonstrated positive effects on mood and quality of life in individuals with depression.

These emerging findings suggest that PCr may still hold therapeutic potential, particularly in specific populations.

Importantly, some of these benefits may again be indirect. Improvements in muscle strength and function – well-established outcomes of creatine supplementation  – are associated with reduced risk of dementia, Alzheimer’s disease, and age-related cognitive decline.

So… should we all be taking creatine for our brains?

There is sound mechanistic reasoning to support a role for phosphocreatine in brain health, and the scientific literature contains genuine signals of promise  – albeit often at relatively high doses of creatine.

At present, more robust evidence is needed to fully understand how creatine supplementation can directly benefit the brain. However, the established importance of PCr for muscle function should not be overlooked, particularly given the growing recognition of the muscle-brain connection.

In other words, while creatine may not be a magic pill for brainpower, its broader role in supporting physical health could still have meaningful implications for how we think, age, and function over time.

The post We Know Creatine Builds Muscle – But What Could It Do for Your Brain? appeared first on Form.

That’s exactly why experts say it’s smart to pay closer attention to your health at this time of year, focussing on getting the sleep, hydration and nutrients your brain and body needs to function at its best.

While we can usually get most of the vitamins and minerals we need from a healthy and balanced diet, this time of year can be particularly relentless, and diet is often one of the first things that starts to slide when plans and parties take over.

If you’re moving through the season gorging on rich food, supping free-flowing alcohol and refuelling with hangover takeaways, supplements could help to bridge any nutritional gaps while giving your immune system some extra TLC.

So what exactly should you have in your winter rotation? We asked Rob Hobson, nutritionist and author of Unprocess Your Life, to suggest the bathroom cabinet essentials for bolstering your winter wellness.

Vitamin D

Known as the ‘sunshine’ vitamin, vitamin D is found in a few select foods, but the body manufactures most of what we need from direct sunlight hitting the skin when outdoors.

During the gloomy autumn and winter months, when light levels are generally lower, most people struggle to produce enough vitamin D, which can snowball into a full blown deficiency if you’re not careful. In fact, around 1 in 5 adults have levels lower than government recommendations. 

“A quality vitamin D supplement is a no-brainer in the winter,” says Hobson. “The latest National Diet and Nutrition Survey shows that nearly 1 in 5 adults are vitamin D deficient overall, but in winter, that figure jumps to about 1 in 3.”

Virtually all immune cells in our body contain a specific ‘docking station’ called the vitamin D receptor, which only the active form of vitamin D can unlock. When paired together, this combo works to calm inflammation and boosts the production of natural antibiotics, which help the body fight viruses. 

It’s no surprise then, that low levels of vitamin D are consistently linked with a higher risk of seasonal respiratory infections. “Large pooled analyses of randomised trials suggest that supplementation gives a modest but meaningful reduction in the risk of colds and other acute respiratory infections,” Hobson notes, “especially in people who start off deficient and take a supplement daily.”

There’s a similar pattern at play in athletes who are training hard over the winter. “Studies in a range of vitamin D–insufficient athletes – from swimmers to taekwondo competitors – show that bringing levels up with daily supplements can reduce upper respiratory tract infection symptoms and cut down days lost to illness.”

To ensure you’re getting enough of the sunny stuff, Hobson’s advice is to take a 10 microgram supplement (400 IU) per day throughout autumn and winter. “Many people, including athletes, may be advised to use slightly higher daily doses under professional guidance, so it’s always worth getting your vitamin levels checked out by a GP,” he adds.

A decent probiotic

Probiotics can be a confusing corner of the wellness world, but at their most basic, they support the ‘good’ microbes living in your gut and make it harder for harmful bacteria and viruses to thrive there.

“If your diet has slipped, you’ve had gut issues recently or you’re taking a course of antibiotics, a targeted probiotic might be worth considering,” says Hobson. “Scientists estimate that around 70% of your immune system sits in the gut, so maintaining a healthy microbiome is one of the best ways to support immune resilience through the winter.”

When it comes to probiotics and their hard-to-pronounce monikers, strain really matters. “One of the best studied is Lactobacillus rhamnosus GG (LGG), which is highlighted by the World Gastroenterology Organisation for use during and after antibiotics,” notes Hobson. 

“Multiple randomised controlled trials and meta-analyses show that LGG significantly reduces the risk of antibiotic-associated diarrhoea in both adults and children when they’re taken at the same time as a course of antibiotics.”

As well as keeping you from a nasty toilet trip, an LGG probiotic can also help recover the bacteria that’s been wiped out by antibiotics. “Studies show it can restore a healthier microbiota profile by increasing beneficial bacteria such as Bifidobacterium and Lactococcus, while reducing more problem-causing microbes like Escherichia,’ Hobson explains.

“It also appears to support the intestinal barrier improving tight-junction proteins and lowering inflammation, which is a key part of immune defence. Some research even shows it helps restore short-chain fatty acid production, which is important for gut motility and overall gut function.”

But trendy probiotics are only one part of the winter wellness story, and you can’t out supplement a bad diet. “The best daily gut support still comes from food getting enough fibre from plants, beans, vegetables and whole grains, and including a dose of fermented foods like kefir, yoghurt, sauerkraut or kimchi where you can,” says Hobson. These help diversify the gut microbiome, which is closely linked to immune health, especially during the winter months.

A cover-your-bases multivitamin

If you’re still scratching your head over supplements and don’t want the hassle of popping multiple capsules every day, a quality multivitamin (like Form’s Multi capsules) acts as a one-stop-shop for your health and immune system, plugging the nutritional gaps that tend to form during busy periods.

“Around Christmas we tend to eat more ultra-processed foods and fewer nutrient-dense meals, so a multivitamin can fill the gaps in things like B vitamins, zinc and selenium, if your diet isn’t quite where you want it to be,” says Hobson.

As he puts it: “It’s a sensible, food-first approach without overpromising on what supplements can do.”

The post What Supplements Should You Be Taking This Winter? A Nutritionist Explains appeared first on Form.

When you’re flitting from office soiree to pub drinks, drinking more than usual and running low on sleep, your immune system can take a serious knock, making it more likely you’ll end up bed-bound with an infuriating case of the sniffles. 

But with studies suggesting that diet and lifestyle are the cornerstones of good immunity, how much can you pre-empt the war against winter bugs? And are there steps we can take now to lower our chances of getting sidelined with the flu later in the month? 

We asked nutritionist Rob Hobson, author of Unprocess Your Life, to share all your need-to-knows…

Can you actually ‘boost’ or ‘front load’ your immunity?

Virtuous social media posts would have us believe that immunity is something we can supercharge with a week of chugging raw juices – but that’s wishful thinking, believes Hobson. “You can’t supercharge your immune system in the way marketing often suggests, and you definitely can’t ‘front load’ it to become temporarily invincible,” he explains. 

At its most basic, immunity is a system that relies on long-term habits. Instead of thinking about sick season as something you can hack in the short-term, Hobson recommends taking long-term steps to support its function. “That means getting adequate sleep, managing stress, eating a nutrient-dense diet, staying active and avoiding smoking,” he explains.

If you’re deficient in key nutrients such as vitamin D, zinc, or selenium, correcting those deficiencies can make a meaningful difference, too. “But this is about bringing your immunity back to normal, not boosting it above normal,” Hobson reminds.

With around 70% of the immune system sitting within the gut, it pays to think about what’s on your plate. “The microbiome trains immune cells, regulates inflammation and helps form your first line of defence – and it responds best to consistency, rather than three-day gut resets,” says Hobson. “Fibre, polyphenols, fermented foods and lots of plants are all great for feeding your good bacteria.”

How long does it take for changes to meaningfully affect your immunity?

It depends, but some things shift faster than you think.

“Immune markers such as natural killer cell activity can change within 24 to 48 hours of improved sleep,” says Hobson. “Stress management works on a similar ‘quick win’ timeline – while long-term stress weakens immunity over weeks to months, simple relaxation techniques can drop cortisol levels almost immediately.”

Dietary tweaks also start making a difference within days to weeks, Hobson reckons, especially if you were running low on key nutrients like vitamin C. “With vitamin D, the timeline is a bit slower though,” he notes. “If you’re deficient, supplementation usually takes about 4 to 8 weeks to create a meaningful rise.” And of course, exercise gives you an instant immune-supporting lift when it’s moderate, though pushing yourself too hard can have the opposite effect.

Which foods and nutrients have the strongest evidence for supporting immunity?

Despite the wellness world’s love for obscure ingredients, the nutrients with the most robust evidence remain delightfully ordinary. As Hobson notes, several are formally recognised by EFSA for supporting normal immune function.

“The best place to start is with vitamin C,” says Hobson. “You’ll find it in many classic weekly shop staples, including citrus fruits, berries, peppers and broccoli.” He adds that vitamin D is another major player, especially in winter, when most of us have to rely on supplements because sunlight is in short supply.

“Zinc is important too,” he explains. “Pumpkin seeds and legumes are your go-to sources.” Plus, there’s selenium, which Hobson points out is “surprisingly easy to get with just a couple of Brazil nuts.”

He also highlights vitamin A, found in bright orange vegetables that look like autumn on a plate. “Don’t forget lots of protein sources too,” he adds, “as your body can’t magic up disease-fighting antibodies out of thin air.”

Obsessing over single hero ingredients is a poor man’s strategy though. “It’s your overall dietary pattern that makes the real difference,” Hobson says. A Mediterranean-style way of eating – full of plants, fibre, healthy fats, legumes and whole grains – is a decent pattern to follow, as it’s consistently linked with stronger immune resilience in peer-reviewed studies.

How does alcohol play a role?

When it comes to immunity, the effects of a boozy night out kick in faster than most people realise. “Within hours of heavy drinking, the number and activity of natural killer cells and lymphocytes drop,” Hobson warns.

“The gut barrier becomes leakier, inflammation ticks upward, and acetaldehyde (aka, the toxic byproduct of alcohol metabolism) triggers oxidative stress,” he adds. These shifts can leave your defences dulled for a full day or more after a big night, leaving you more susceptible to illness. 

What can people do in the lead-up to party season?

Keen to avoid feeling sick on Christmas Day? Here’s how Hobson recommends you armour yourself this month…

1. Protect your sleep as if it were skincare

“Sleeping for 7 to 9 hours should be a non-negotiable in your routine. Even one poor night dents immune cell activity.”

2. Keep alcohol strategic

“Rather than cracking open the Baileys every night, spacing out heavier drinking days helps your immune system recover.”

3. Prioritise nutrient density

“When in doubt, stick to Mediterranean-style staples. That means loading up on vitamin C from plenty of fruit and veg; getting zinc from beans, and seeds; picking up selenium from Brazil nuts; and finding vitamin A in those vibrant orange vegetables.”

4. Feed your gut the way you’d tend a houseplant

“Think about nourishing your microbiome with fibre, fermented foods and lots of plants.”

5. Move your body daily

“Gym motivation can be harder in winter, but movement supports immune surveillance – the body’s internal neighbourhood watch.”

6. Manage stress

“Just ten minutes of breathing, stretching or mindfulness can meaningfully regulate the stress hormone cortisol”

7. Consider vitamin D supplementation

“Most of us need to supplement during the winter months, as few of us naturally produce enough of this vitamin when it’s gloomy outside.”

The post Can You Frontload Your Immunity Ahead of Christmas Party Season? appeared first on Form.

But is it really that straightforward? Not exactly. While fasting focuses on when you eat, your diet quality – especially your protein intake – is still an important consideration, especially if you’re plant-based. 

To help us unpack the science, we spoke with Yana Petkova, a PhD researcher working under Dr Adam Collins, Form’s Head of Nutrition. Dr Collins is also the Director of BSc and MSc Nutrition at the University of Surrey and holds a PhD in Body Composition.

“When we look at the research, there is very little focus on changes to diet quality during fasting-based diets,” says Yana. “For example, we don’t know for sure whether limiting the opportunities to eat in the day could compromise our intake of certain important nutrients, such as fibre and protein.”

“People with a lower protein intake, such as those following a vegan diet, or older adults who may have higher requirements, might be at risk of under-consuming protein if they’re following a fasting-based diet.”

Here, we asked Yana to explain what fasting actually does in your body, and how protein fits into the bigger picture…

What is fasting?

Fasting is the state we enter once the body has used up the energy from our last meal. This typically takes around 10–12 hours, which means many of us only spend a short window in this state – usually during the latter part of an overnight fast. As soon as we eat breakfast, we move into what’s known as the postprandial metabolic state, a period lasting several hours in which we absorb and utilise the energy and nutrients from our food.

With food so readily available and lifestyles becoming increasingly irregular, a growing proportion of the population fasts rarely – if at all. In fact, many people only refrain from eating for 8–10 hours overnight, meaning they may spend virtually no time in a true fasted state.

Why is fasting gaining traction?

Evidence is steadily mounting that spending even a few hours in a fasted state can be beneficial for health. During fasting, the body switches from using glucose to relying more heavily on fat as a primary fuel source. In practical terms, this means fat cells begin releasing more fat than they store -a process called lipolysis.

Fasting also appears to create ideal conditions for cellular repair, although researchers are still uncovering the precise mechanisms involved.

At a whole-body level, dietary approaches that increase time spent fasting are associated with a spontaneous reduction in calorie intake, small to moderate weight loss, improved blood pressure and enhanced insulin sensitivity.

How does protein fit into the fasting puzzle?

Protein is particularly interesting in the context of fasting because there’s still no clear consensus on what actually ‘breaks’ a fast. For example, advice varies widely on whether a dash of milk in your tea or adding pure fat to your morning coffee is acceptable when practising TRE.

Carbohydrate intake clearly raises insulin, flipping the metabolic switch from fat-burning (lipolysis) back to fat storage, and shifting the body toward glucose as its main energy source. In theory, nutrient intake that maintains lipolysis – namely, foods without carbohydrate – could help preserve some of the metabolic benefits of fasting.

Pure fat would maintain lipolysis, but it also provides an immediate energy source. For many people this isn’t particularly appealing taste-wise, and it may reduce the body’s incentive to draw on its own fat stores.

Protein has a more nuanced effect. Although it does supply energy, consuming it without carbohydrate or fat may limit its ability to disrupt the fasted state. Preliminary findings from an unpublished study under review suggest that while consuming 20 g of unflavoured plant protein caused a temporary change in fasting biomarkers, it did not cause a whole-body shift to a postprandial state.

Certain amino acids, aka the building blocks of protein, can cause a rise in insulin, but this increase is smaller than the response seen after eating carbohydrates. Animal proteins typically contain more of the insulin-stimulating amino acids than plant proteins, so plant-based protein may preserve fasting to a greater extent.

Why might I want to consider protein while following a fasting-based diet?

Fasting-based dietary approaches, such as alternate – day fasting, the 5:2 diet, and time-restricted eating (TRE) – often lead to smaller portion sizes and fewer eating occasions throughout the day. This can increase the risk of under-consuming protein, particularly in individuals who already have a lower baseline intake. Early results from an ongoing TRE study show reductions not only in calorie intake but also in fibre and protein in adults eating an otherwise unrestricted diet.

Because the body has a very limited ability to store protein, a fasted state naturally increases the breakdown of muscle tissue to supply the protein needed for essential functions. Adequate protein intake, ideally spread evenly across the day and paired with resistance training is therefore crucial for maintaining lean mass, especially during weight loss.

Protein is also the most satiating macronutrient, so including a protein-rich ‘snack’ may help curb hunger and improve adherence for those who struggle with fasting-based dietary patterns.

The post Everything You Need to Know About Protein and Fasting Diets appeared first on Form.

It’s known as protein loading and, broadly speaking, is the process of increasing protein intake to build muscle or consuming a majority of your daily protein at the beginning of the day to help control appetite and front-load your nutrition. The logic of protein loading is understandable, but does the science back it up? We asked sports nutritionist Paul Garrod (IOPN Dip. SEN) for his take on protein loading, and whether it’s actually an efficient way of getting your macros in, or if it’s missing the mark completely when it comes to everyday nutrition.

Paul, what exactly is protein loading, and how does it differ from simply eating more protein?

It’s where you increase protein intake, usually before intense training or competition, to maximise amino acid availability for muscle repair and performance. It differs from simply eating more protein long-term because loading is temporary and is often timed. The aim is to boost acute metabolic responses rather than change overall daily dietary patterns.

Can protein loading support muscle growth and recovery?

The idea is that protein loading and post-workout protein intake reduce muscle breakdown, accelerate recovery, and enhance training adaptations. Ultimately, it’s about consistently meeting your daily protein needs to prevent deficits that can limit strength.

Does protein loading fit into a balanced diet for everyday people who aren’t athletes?

Protein loading can help manage appetite, but for non-athletes, it’s best to focus more on a varied diet with balanced carbs, fats, and fibre.

What common mistakes do people make when trying to increase their protein intake?

Overeating protein while neglecting fruits, vegetables, and whole grains, relying on processed shakes, ignoring hydration, skipping fibre, and not spreading protein intake evenly across meals.

So, is it true that the body can only absorb a certain amount of protein at one time?

The body absorbs nearly all protein eaten, but it can only use about 20-40 g per meal for muscle-building. Extra protein is still metabolised for energy or other needs, so it’s not wasted, but it won’t further stimulate muscle synthesis.

When should we have it?

It’s about distributing protein evenly throughout the day and consuming a protein rich meal within one to two hours post-exercise, as this optimises muscle protein synthesis.

What about before bed?

A pre-sleep protein dose can also enhance overnight recovery and adaptation, yes.

Let’s talk about appetite. Protein loading is thought to help with a reduction in appetite and cravings. Is that right?

Increasing protein at meals does increase satiety and can reduce between meal snacking but I would say it’s less about specifically loading protein and more about increasing protein intake throughout the day.

Any downsides we should know about?

Excess protein can strain kidneys in people with existing kidney disease, displace other nutrients, increase dehydration risk, and cause digestive discomfort. Very high intakes may also raise long-term cardiovascular and bone-health concerns, though evidence varies and the doses are often extremely high, making it extremely hard to do.

What about building muscle? How drastically should we increase protein intake? Is more always better?

You can build muscle without huge protein increases. Most people gain well with moderate intakes (about 1.2-1.6 g/kg of bodyweight/day), if training is also progressive. Beyond this range, extra protein offers little added benefit for most people really.

Plant-based protein, like Form, is our choice. Do they work as well for protein loading as animal-based ones?

Absolutely. Plant proteins can support protein loading, especially when varied to provide all essential amino acids. They may be slightly less satiating per gram, but adequate amounts can work effectively.

Any other protein-related myths you’d like to bust?

Many. First, the body can’t absorb more than 20g of protein at once (it absorbs nearly all protein); that high protein inevitably harms healthy kidneys; that plant proteins are “incomplete” or inferior (if the sources are varied then it will meet dietary needs); and that massive protein intakes automatically build more muscle without proper training.

The post A Sports Nutritionist Breaks Down the Real Science Behind Protein Loading appeared first on Form.

Whether it’s an overflowing inbox, the relentless cycle of negative global events or the cost of living crisis, few of us are strangers to the effects of having too much on our plates, and it’s often easier said than done to tap out of the careers and responsibilities that are pushing us closer to burnout.

As such, many of us are now looking for small but effective ways to regulate our nervous systems and curtail our cortisol levels, in an effort to better manage our fractious, modern lives. Sure, you might not be able to quit your corporate 9-5 and jet off to a remote Greek island, but you can swap those cortisol-ramping HIIT workouts for gentler LISS sessions that don’t spike your adrenaline.

So when it comes to diet, are there certain foods we can prioritise to reduce the symptoms of stress – and how big of a difference do our nutrition choices actually make? We asked Form’s resident nutrition expert, Dr Adam, to chew over the facts.

First up, what exactly is cortisol and how is it linked to stress?

Cortisol is a glucocorticoid hormone released through your hypothalamic–pituitary–adrenal (HPA) axis, which is basically a direct line from your brain to your adrenal glands. It’s symbolic of stress because when your stress response fires up, that HPA axis triggers the release of cortisol.

It’s often labelled the ‘stress hormone’, but it’s not inherently bad. In fact, cortisol is essential for helping your body mobilise fuel – it plays a big role in glucose regulation, fat metabolism and your overall energy response. It only becomes problematic when levels stay chronically high or are released at the wrong times of day.

So timing matters when it comes to the release of cortisol?

Yes, timing and context are key. Cortisol naturally follows a circadian rhythm in our bodies  – it peaks in the morning to help you wake up and gradually declines throughout the day. If you’re constantly stressed, eating erratically, or not sleeping well, that rhythm gets disrupted.

Cortisol becomes an issue when it’s persistently high (as it’s a sign your stress response is firing regularly) or when it’s released at times when your body’s already flooded with glucose or insulin – that’s when you can start seeing issues like extra fat storage on the body, leading to weight gain, or glucose dysregulation, which can cause a wide range of health issues by damaging blood vessels and organs over time.

Can you actually lower cortisol through diet alone?

Diet definitely plays a part, but it’s only one piece of the puzzle. Because cortisol levels fluctuate so much throughout the day, it’s really hard to pinpoint exactly how much diet alone can change them.

That said, there’s evidence that people who follow healthier eating patterns tend to have lower cortisol overall; the Mediterranean diet is just one well studied example of this. The reason it may be effective at managing cortisol is probably down to the combination of factors: it’s higher fibre, full of healthy fats such as omega-3s, contains antioxidants from all the fruit and vegetables and has a general reduction in ultra-processed foods and saturated fat.

Generally, the whole foods you find in the Mediterranean diet are known to support metabolic health and reduce inflammation, both of which can help regulate cortisol indirectly.

Are there specific foods that are good for regulating cortisol?

Not really in isolation. You’ll often see lists online claiming that certain foods ‘lower cortisol’, but the evidence for these specific ingredients is fairly weak. Omega-3 fatty acids, fibre-rich foods that support the gut, and plenty of colourful fruit and vegetables are all beneficial – but it’s the overall dietary pattern that really matters.

We eat meals, not individual nutrients, so it’s the collective effect of your whole diet that counts.

And what about meal timing – does intermittent fasting help?

Essentially, there’s no one-size-fits-all rule when it comes to meal timing. There’s evidence to suggest that reducing your eating window can be helpful because it allows your body more time in a fasted state. For instance, eating over 10 hours instead of 12 or more.

Early time-restricted eating (where you finish your last meal earlier in the evening) seems slightly more effective than eating late too, but consistency is the thing that’s more important here. Constant snacking or eating late at night means you’re keeping your glucose and insulin levels up when cortisol is still active, which can make fat storage more likely, especially around the abdomen.

So, making sure your eating habits are aligned with your body’s natural rhythms can make a potentially meaningful difference to your cortisol levels.

What’s the takeaway for anyone looking to manage stress through diet?

Generally, I’d say to focus on the basics of eating mostly whole, unprocessed foods, getting enough fibre and protein, including healthy fats and trying to keep a regular eating pattern. If you’re looking for some rough guidelines, the Mediterranean diet is still the best-evidenced approach overall.

It’s also important to caveat that your diet alone won’t fix chronic stress, especially if the rest of your lifestyle is working against you – so take a look at your routine and see where you can remove or reduce overall stressors. 

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The good news if you’re yet to jump on the gut health bandwagon? Studies suggest that our microbiome doesn’t exist in a fixed state, and that it’s highly adaptable to change.

To that end, we asked Clementine Vaughan, leading dietician at Third Sister, to break down the best evidence-backed strategies to positively shift your gut flora and feel more balanced.

How quickly can you change your gut bacteria?

“There’s research to suggest that your gut health can change surprisingly quickly, sometimes in as little as a day,” explains Vaughan. “A good example is taking a course of antibiotics to treat an infection – this can effectively wipe out much of your gut microbiome overnight,” she notes. 

When it comes to improving and supporting the microbiome, benefits can take a little longer to show and require a level of commitment, as studies have found that gut microbes can return to their original make-up if you’re not consistent with good habits.

“Long-term change comes first and foremost from your diet,” says Vaughan, “as your microbiome is a bit like a rainforest; it isn’t a simple case of eating one food and expecting one specific strain of bacteria to grow.

“Instead, what you eat can influence many different strains at once, which in turn interact with others, helping some to thrive and others to be suppressed.”

In this way, your gut is a constantly evolving ecosystem, and one that needs continual nourishment to keep it in harmony. “A good analogy is that it’s like looking after a sourdough starter – you can’t just feed it once and expect it to last forever. You have to care for it regularly,” Vaughan adds.

Vaughan’s golden rules for improving your gut health

Opt for 30 grams of fibre per day

The most effective way to change the environment in your gut doesn’t lie in punishing detoxes or liquid diets, but in simply upping your intake of plant-based foods which are rich in dietary fibre.

Not only does a diet full of fibre aid digestion, but it serves as ‘good’ food for gut bacteria. Despite this, it’s a real point of deficit for many people, with more than 90% of adults not eating enough according to the National Diet and Nutrition Survey (NDNS).

“The recommended daily fibre intake for adults is 30 grams, which is a lot higher than many people expect,” says Vaughan. “In practice, that can be a tall order to reach, particularly if you’re not already in the habit of eating fibre-rich foods.”

If you’re looking for easy ways to up your roughage, Vaughan suggests throwing a spoonful of flaxseeds and chia seeds into your breakfast cereal or yoghurt. “You can even stir them into guacamole or scatter them over a salad,” she adds. “It’s these add-ons that can really make a difference.”

Bulk out your meals with beans

Beans are considered a superfood because they’re one of the most nutritious foods you can eat. Packed with both soluble and insoluble fibre, they support digestion and can keep you feeling fuller for longer. Some of the most fibre-rich options include lentils, chickpeas, black beans and kidney beans.

“Next time you’re having a salad, throw in some canned varieties,” says Vaughan. “They’re cheap, easy to store and incredibly versatile. You can stir them into stews, soups or pasta dishes, and they really pack a punch when it comes to boosting your fibre intake.”

Know your high-fibre plants

But it’s also worth knowing that not all plant foods are made equal, and some are less fibrous than others. 

“Take lettuce for example – people often think it’s fibre-rich, but really it’s mostly water, at least in the quantities we tend to eat,” warns Vaughan. “It’s still great to have, but if you’re looking to hit that 30-gram target, you’ll want to prioritise higher fibre-dense foods such as lentils, chickpeas and avocados.”

Eat the rainbow

Studies still suggest that eating the oft-quoted five portions of fruit and vegetables a day can have a positive impact on your gut health.

However, when it comes to your microbiome, there’s a new school of thinking that it’s not just the amount of plants we pack into our meals, but the variety we get too.

Aiming to eat 30 different plants a week can boost the diversity and health of your gut bacteria, although Vaughan stresses that this target might not be achievable for everyone overnight.

“If you’re currently averaging around ten plant varieties a week, try nudging it up by adding one or two extra plants to your shopping trolley, and gradually increasing the number over time.”

Go slowly

Finally, adding fibre to your diet slowly over a few weeks allows the natural bacteria in your digestive system to adjust to the change. Throw too much into the mix, too soon, and you could be struck with an uncomfortable bout of bloating and gas.

“If you’ve calculated you’re not getting enough fibre and it’s something you’re wanting to up, my advice would be to take it slowly,” says Vaughan. She recommends focusing on adding an extra few grams to your diet per day, using a tracker like MyFitnessPal to keep track of your count. 

“Keep slowly nudging up your intake over several weeks and don’t go too quickly, because you might worry that it’s making you feel worse, and then you’ll be more likely to revert back to your previous dietary habits.”

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In this guide, we unpack the science behind protein requirements, reveal why traditional guidelines fall short, and share an evidence-based approach to hitting the right targets. Whether you are plant-based, training hard, or simply aiming to age healthily, moving from minimums to optimal ranges can transform your energy, recovery, and long-term wellbeing.

The Origins of Protein Guidelines: Why They Miss the Mark

The Recommended Dietary Allowance (RDA) for protein is 0.8 grams per kilogram of body weight per day. However, this figure was never intended to define what is optimal. Instead, it was designed decades ago as the minimum required to prevent deficiency in sedentary adults (1).

This number was derived from nitrogen balance studies, which compare nitrogen intake (from dietary protein) to nitrogen output (mainly in urine and faeces). While innovative at the time, this method has serious limitations:

• Inaccurate nitrogen loss estimates. Nitrogen is also lost through sweat, skin, hair, and nails, which are difficult to measure. As a result, true protein requirements were underestimated (2).
• Short study durations. Many nitrogen balance trials lasted only a few days. The body can adapt to temporarily low intake, masking true needs.
• Adaptation effect. When protein intake is insufficient, the body downregulates protein-dependent processes, such as muscle protein synthesis or immune activity. On paper, this looks like “balance,” but in reality it reflects an under-fueled system.

Key takeaway: meeting the RDA ensures you avoid deficiency, but it does not guarantee you are optimally nourished. Nitrogen balance may show you are not wasting muscle, but it says little about whether you are maintaining muscle mass, building new tissue, recovering effectively, or supporting broader aspects of metabolic and immune health.

What the New Science Shows: Tracer Studies and Muscle Protein Synthesis

Modern research has moved beyond nitrogen balance, using amino acid tracer studies and direct measures of muscle protein synthesis (MPS). These methods provide far more insight into how protein intake supports muscle repair, growth, and health.

What we now know:

• MPS per meal has a ceiling, but it depends on time measured. In younger adults, studies often report that ~0.24 g/kg of protein per meal maximises MPS, but these measurements are typically taken over 3-4 hours (3). If you extend measurement to 12 hours, additional gains are seen. This suggests larger “feast-style” doses can still be effective if followed by a longer fasting window, which may be relevant for time-restricted feeding or intermittent fasting.
• Daily intake is higher than the RDA. Distributing ~0.4 g/kg per meal across 3-4 meals yields ~1.6 g/kg/day. Evidence suggests benefits extend up to ~2.2 g/kg/day (4), (5).
• Older adults need more due to anabolic resistance. This term describes the reduced ability of muscles to take up amino acids and glucose and convert them into new proteins. It stems partly from loss of muscle mass, but also from diminished metabolic activity within muscle tissue. As a result, older adults often need ~0.4-0.6 g/kg per meal to maximise MPS (6).

Real-world implications: people who consistently eat within the 1.6–2.2 g/kg/day range maintain more muscle during weight loss, gain more during training, recover faster, and enjoy better health outcomes over time.

Beyond Muscle: Why Protein Supports Healthy Ageing

Protein is not just for athletes. It is essential for healthy ageing and long-term resilience.

• Muscle mass and survival. Low muscle mass and poor strength are strongly linked to higher mortality risk (7), (8). Low fitness is a stronger predictor of early death than traditional risk factors such as smoking or hypertension. Maintaining muscle through adequate protein intake and exercise dramatically lowers risk.
• Immune, organ, and metabolic health. Amino acids from protein build not only muscle, but also enzymes, hormones, and immune cells. Adequate protein supports wound healing, immune resilience, and metabolic function (9).
• Ageing paradox. Despite increased need, older adults often eat less protein. Up to half of women over 70 fail to meet even the RDA (9). Reduced appetite, chewing difficulties, and lower food intake contribute to this shortfall.

High Protein Intakes: How Much Is Too Much?

Concerns about high-protein diets, especially kidney health, are common. But the evidence consistently shows that higher intakes are safe for healthy people.

• Extreme intakes tested. Resistance-trained men consumed ~4.4 g/kg/day for 8 weeks with no adverse changes in health markers such as kidney function, liver enzymes, blood lipids, or body composition. (10).
• One-year trial. At ~3.3 g/kg/day for 12 months, participants experienced no harm to kidney or liver function, or to blood lipids (11).
• Improved body composition. At ~3.4 g/kg/day, subjects gained lean mass and lost fat without negative health outcomes (12).

Kidney health clarified: most studies linking protein to kidney decline are in patients with existing chronic kidney disease (CKD). In healthy people, kidneys adapt to higher filtration loads without long-term damage (13). Reviews confirm intakes up to ~2.5-3 g/kg/day are safe (14), (15).

Optimising Protein Intake on a Plant-Based Diet

Getting enough high-quality protein on a plant-based diet is absolutely achievable with variety and planning. You do not need to combine complementary proteins at each meal, as once thought. Instead, focus on total daily variety.

• Choose diverse protein sources. Soy foods like tofu, tempeh, and edamame are complete proteins. Lentils, chickpeas, beans, quinoa, buckwheat and hemp contribute to a robust amino acid profile (16). For practical inspiration, see our roundup of the best vegan protein sources.
• Spread intake across meals. Aim for 25-40 g per meal, across 3-4 meals per day. This supports muscle protein synthesis and recovery (9).
• Use supplementation strategically. Plant-based protein powders, provide a convenient way to cover gaps, particularly post-training (17).
• Benefit from nutrient density, with a caveat. Many plant proteins come with fibre, antioxidants, and micronutrients that support cardiovascular and gut health. Replacing animal protein with plant protein is linked to lower chronic disease risk (16). The trade-off is that plant proteins are less energy-dense, meaning you often need to eat a higher bulk of food to reach the same protein intake.

How to Calculate Your Optimal Protein Intake

A simple formula gives you your daily protein target:

Body weight (kg) × 1.6-2.2 = grams of protein per day

For example, if you weigh 68 kg (150 lbs), your optimal range is 109–150 g/day (4), (5).

• Use the higher end (≈2.0–2.2 g/kg) if you are very active, dieting, older, or plant-based.
• Use the lower end (~1.6 g/kg) if you are less active, have higher body fat, or are just starting with exercise.
  

Remember, these numbers reflect what is optimal, not the bare minimum.

Is Protein Timing Important?

Yes. When you eat protein is almost as important as how much.

• Even distribution works best. Spreading protein evenly across meals leads to greater total muscle protein synthesis than skewing most intake to dinner (18).
• Pre-sleep protein is effective. Consuming 30-40 g of protein before bed enhances overnight synthesis and recovery (19). For evening meals or snacks, a plant protein that digests more gradually, such as soy, can provide a steady release of amino acids overnight. Blends of pea and rice protein are also valuable because they supply a complete amino acid profile and support recovery through the night.

If faster delivery is needed, for example after late-night training, more rapidly absorbed plant protein isolates such as pea protein isolate are ideal. These options are higher in leucine and lower in fibre and fat, allowing amino acids to reach the bloodstream more quickly and stimulating muscle protein synthesis sooner.

Example for a 70kg person aiming for ~130g/day:

• Breakfast: 30g
• Lunch: 35g
• Snack: 25g
• Dinner: 40g

Key Takeaways

• The RDA is a baseline, not a target.
• 1.6-2.2g/kg/day consistently supports muscle, recovery, and longevity.
• Older adults and plant-based eaters should aim for the higher end.
• Intakes up to 2-3x the RDA are safe for healthy individuals.
• Plant proteins can fully support your needs when varied and distributed across meals.
  

Final Thoughts

Protein needs to be thought of in terms of what supports optimal health, not just avoiding deficiency. The RDA of 0.8g/kg per day represents the minimum to prevent deficiency in sedentary adults, but for most people, especially those who are active or ageing, this is unlikely to be sufficient for strength, recovery, and long-term health.

In practice, many adults already consume more than the RDA, averaging around 1.2g/kg per day in the UK. However, this is still below the levels consistently shown to be most beneficial. Older adults in particular are at greater risk of falling short, despite having higher requirements due to anabolic resistance and natural muscle loss with age.

Protein is more than muscle fuel, it is a cornerstone of resilience, healthy ageing, and performance. Whether your goal is to train harder, age well, or simply feel more energetic, optimising protein intake is one of the smartest nutrition choices you can make.

References

1. Subcommittee on the Tenth Edition of the Recommended Dietary Allowances. Recommended Dietary Allowances. National Academies Press; 1989. doi: 10.17226/1349
2. Miller DS, Payne PR. Assessment of protein requirements by nitrogen balance. Proc Nutr Soc. 1969;28(2):225–233. doi: 10.1079/pns19690043
3. Moore DR, Robinson MJ, Fry JL, et al. Ingested protein dose response of muscle protein synthesis after resistance exercise in young men. Am J Clin Nutr. 2009;89(1):161–168. doi: 10.3945/ajcn.2008.26401
4. Morton RW, Murphy KT, McKellar SR, et al. Effect of protein supplementation on resistance training-induced gains: a meta-analysis. Br J Sports Med. 2018;52(6):376–384. doi: 10.1136/bjsports-2017-097608
5. Nunes EA, Colenso-Semple L, McKellar SR, et al. Protein intake to support muscle mass and function: a systematic review and meta-analysis. J Cachexia Sarcopenia Muscle. 2022;13(2):795–810. doi: 10.1002/jcsm.12922
6. Nowson C, O’Connell S. Protein requirements for older people: a review. Nutrients. 2015;7(8):6874–6899. doi: 10.3390/nu7085311
7. Kokkinos P, Faselis C, Samuel IBH, et al. Cardiorespiratory fitness and mortality across age, race, and sex. J Am Coll Cardiol. 2022;80(6):598–609. doi: 10.1016/j.jacc.2022.05.031
8. Mandsager K, Harb S, Cremer P, et al. Association of cardiorespiratory fitness with long-term mortality among adults undergoing exercise treadmill testing. JAMA Netw Open. 2018;1(6):e183605. doi: 10.1001/jamanetworkopen.2018.3605
9. Bauer J, Biolo G, Cederholm T, et al. Evidence-based recommendations for optimal dietary protein intake in older people: PROT-AGE Study Group. J Am Med Dir Assoc. 2013;14(8):542–559. doi: 10.1016/j.jamda.2013.05.021
10. Antonio J, Peacock C, Ellerbroek A, et al. A high protein diet (4.4 g/kg/d) in resistance-trained individuals. J Int Soc Sports Nutr. 2014;11:19. doi: 10.1186/1550-2783-11-19
11. Antonio J, Ellerbroek A, Silver T, et al. A high protein diet has no harmful effects: a one-year crossover study in resistance-trained males. J Nutr Metab. 2016;2016:9104792. doi: 10.1155/2016/9104792
12. Antonio J, Ellerbroek A, Silver T, et al. A high protein diet (>3 g/kg/d) combined with resistance training improves body composition in healthy adults. J Int Soc Sports Nutr. 2015;12:39. doi: 10.1186/s12970-015-0100-0
13. Knight EL, Stampfer MJ, Hankinson SE, et al. The impact of protein intake on renal function decline in women: a prospective study. JAMA. 2003;289(24):3243–3249. doi: 10.1001/jama.289.24.3243
14. French SJ, Kanter M, Maki KC, et al. The harms of high protein intake: conjectured but unproven. Am J Clin Nutr. 2025;122(1):9–16. doi: 10.1016/j.ajcnut.2025.05.002
15. Halbesma N, Bakker SJL, Jansen DF, et al. High protein intake associates with cardiovascular events but not with loss of renal function. J Am Soc Nephrol. 2009;20(8):1797–1804. doi: 10.1681/ASN.2008060649
16. Mariotti F, Gardner CD. Dietary protein and amino acids in vegetarian diets: a review. Nutr Rev. 2019;77(11):579–593. doi: 10.1093/nutrit/nuz061
17. Messina M. Soy and health update: evaluation of the clinical and epidemiologic literature. Nutrients. 2016;8(12):754. doi: 10.3390/nu8120754
18. McKenna CF, Salvador AF, Hughes RL, et al. Protein distribution and gut microbiota during resistance training: a randomized trial. Am J Physiol Endocrinol Metab. 2021;320(5):E900–E913. doi: 10.1152/ajpendo.00574.2020
19. Trommelen J, van Loon LJC. Pre-sleep protein ingestion to improve recovery and adaptation to exercise training. Nutrients. 2016;8(12):763. doi: 10.3390/nu8120763

The post From Enough to Optimal Protein: Why the Difference Matters appeared first on Form.

Here’s what anyone training for endurance should know.

Time-to-Exhaustion Gets a Boost

The standout finding: supplementing with protein during an endurance training programme significantly improves time-to-exhaustion. In other words, people were able to go for longer before fatigue set in. This is a key performance marker in endurance activities like running, cycling, and rowing.

Protein is often associated with building muscle, but this study highlights its lesser-known role in supporting sustained performance.

Lean Mass: A Modest but Meaningful Gain

The analysis also revealed a small, though statistically non-significant, increase in lean body mass. While not dramatic, this gain could still be meaningful for those looking to maintain or build muscle during high-volume endurance training.

Interestingly, untrained individuals experienced more noticeable changes in lean mass. This suggests that training status plays a role in how the body responds to added protein.

No Major Impact on VO₂max or Body Fat

Despite the endurance benefits, protein supplementation showed minimal effect on VO₂max, aerobic or anaerobic capacity, body weight, or fat mass. However, the review noted that less experienced individuals may experience greater physiological changes. This is particularly useful for beginners or those just starting an endurance routine.

Recovery Still Matters

Even in areas where performance metrics didn’t shift significantly, protein still plays a key role in recovery. Consuming protein post-exercise helps replenish glycogen stores and supports muscle repair. This is essential for anyone doing multi-day training or back-to-back sessions.

For best results, pair protein with carbohydrates after training to accelerate recovery and reduce muscle breakdown.

Final Thoughts

This meta-analysis adds valuable insight into the role of protein for endurance training. While it may not dramatically change VO₂max or body fat, it can help improve endurance capacity and support recovery – both critical for consistent progress.

As always, quality matters. Choosing a clean, complete, and sustainably sourced protein makes a difference, especially for those training hard and living consciously.

References

Frontiers in Nutrition: Effects of Protein Supplementation During Endurance Training

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