Browse the evidence

Higher total daily protein intake (1.2–1.5 g/kg body weight) mitigates age-related muscle loss in older adults, and when this higher intake is achieved, the specific source of protein (animal vs. plant) has no significant differential effect on muscle mass or strength gains.

If you are an older adult trying to maintain or build muscle, focus on hitting 1.2 to 1.5 grams of protein per kilogram of body weight every day. You do not need to buy expensive whey protein supplements. Plant-based proteins like soy or pea work just as well as animal proteins, provided you eat enough of them (typically >30 grams per meal) to trigger muscle growth. If you have severe kidney disease, consult a doctor before increasing protein.

Bodybuilders should consume 1.6–2.2 g of protein per kg of body weight daily, distributed in doses of 0.40–0.55 g/kg per meal across 3–6 meals.

Eat 1.6 to 2.2 grams of protein for every kilogram of your body weight each day. Split this total into 3 to 6 meals, aiming for roughly 0.4 to 0.55 grams per kilogram per meal. This ensures you hit the leucine threshold for muscle growth in each feeding without overconsumption.

Replacing saturated fat with unsaturated fats (PUFA/MUFA) significantly reduces cardiovascular disease risk and all-cause mortality, whereas replacing saturated fat with refined carbohydrates does not improve overall cardiovascular risk.

To lower your heart disease risk, swap high-saturated-fat foods (like fatty meats and full-fat dairy) for unsaturated fats found in plant oils (olive, canola), nuts, and seeds. Do not replace these fats with refined carbohydrates like white bread or sugar, as that fails to improve cardiovascular risk.

A high-protein vegan diet rich in mycoprotein supports daily myofibrillar protein synthesis rates and skeletal muscle hypertrophy comparable to an isonitrogenous omnivorous diet during progressive resistance training in young adults.

If you are vegan and want to build muscle, ensure you are eating approximately 2 grams of protein per kilogram of body weight daily. Focus on high-quality plant sources like mycoprotein (found in products like Quorn), soy, or pulses. Combine this with a consistent resistance training program (at least 3-4 times per week). You do not need animal products to achieve muscle growth or strength gains comparable to omnivores, provided you meet your protein targets.

Soy protein supplementation supports muscle growth and strength development comparably to whey protein when both are matched for leucine content during resistance training.

If you are using soy protein to build muscle, ensure your supplement provides about 2-3 grams of leucine per serving (which may require slightly more total soy powder than whey). When matched for this key amino acid, soy supports muscle growth and strength gains just as effectively as whey during resistance training.

Adherence to a traditional Mediterranean dietary pattern (rich in vegetables, fruits, nuts, legumes, unrefined cereals, moderate fish/shellfish, and fermented dairy) is associated with reduced all-cause and cardiovascular mortality in primary and secondary prevention of cardiovascular disease.

Adopt a dietary pattern centered on vegetables, fruits, nuts, legumes, and unrefined cereals. Use olive oil as your primary fat source. Include moderate amounts of fish, shellfish, and fermented dairy. Limit red and processed meats. This approach is more effective for long-term cardiovascular health than focusing solely on reducing saturated fat.

Replacing saturated fats with unsaturated fats (particularly polyunsaturated and monounsaturated fats) provides the greatest cardiovascular benefit, whereas replacing saturated fat with refined carbohydrates does not.

Reduce intake of saturated fats (found in butter, fatty meats, full-fat dairy) and replace them with unsaturated fats (found in olive oil, nuts, seeds, fatty fish). Do not replace them with refined carbohydrates like white bread or sugar, as this does not improve cardiovascular outcomes.

Current U.S. Recommended Dietary Allowance (RDA) for protein (0.8 g/kg/day) is likely insufficient for older adults, athletes, and pregnant/lactating women, as newer methodologies (IAAO) and functional outcome studies suggest higher intakes (1.2–2.6 g/kg/day) are required for optimal health and physical function.

If you are over 65, an athlete, or pregnant, aim for more protein than the standard 0.8g/kg. Target 1.2-1.6g/kg for older adults to protect muscle, and up to 1.6-2.0g/kg for athletes. Distribute this protein evenly across meals to maximize muscle synthesis.

Higher overall diet quality, specifically defined by adherence to Swedish nutrition recommendations for saturated fat, polyunsaturated fat, fish, fiber, fruit/vegetables, and sucrose, is associated with a statistically significant reduction in the risk of incident atherosclerotic cardiovascular disease (ACVD).

Adopt a diet that prioritizes fish (at least 300g/week), high fiber (≥2.4g/MJ), and plenty of fruits and vegetables (≥400g/day), while limiting saturated fats to ≤14% of energy, polyunsaturated fats to 5-10%, and sucrose to ≤10%. This pattern, when maintained long-term, significantly lowers your risk of heart disease and stroke, independent of your blood pressure or cholesterol levels.

Whey protein supplementation significantly increases appendicular skeletal muscle mass index and gait speed in older adults with sarcopenia compared to placebo or routine consultation.

If you are an older adult diagnosed with sarcopenia, adding whey protein supplements to your diet can help increase your muscle mass and improve your walking speed. You do not necessarily need to combine this with resistance training to see benefits in muscle mass and gait speed, though training may offer additional strength benefits. Aim for 9.6 to 40 grams of whey protein per serving, taken 1-3 times daily, over a period of at least 8 weeks.

Consuming plant proteins in efficacious doses (typically larger than animal protein doses) over 8–12 weeks stimulates similar exercise training adaptations (strength, fat-free mass) as animal proteins.

You can build muscle and strength with plant protein just as well as animal protein. The key is dose: because plant proteins often have less leucine and lower digestibility, you need to eat more of them (e.g., 24-48g per serving) to get the same muscle-building signal as a smaller dose of whey. Ensure your total daily protein intake is high enough (around 1.6g/kg/day) and you will see similar results in strength and size.

Female elite football players should consume carbohydrates in the range of 7-10 g/kg body weight per day to optimize glycogen stores, with adjustments based on training load.

To perform well, female footballers need high carbohydrate intake, typically 7-10 grams per kilogram of body weight daily, especially during heavy training. Adjust this down to 3-6 g/kg on lighter days. Prioritize carbohydrate-rich foods like bread, rice, and fruits, and ensure you tolerate these amounts during training before using them in matches.

Protein intake for female elite football players should be optimized at 1.2-1.4 g/kg body weight per day, focusing on quality and distribution (e.g., 0.3 g/kg per meal) rather than supplementation.

Aim for 1.2-1.4 grams of protein per kilogram of body weight daily, spread across 4 meals (approx 0.3 g/kg per meal). Focus on high-quality sources like dairy, eggs, or meat to ensure complete amino acid profiles. Protein supplements are likely unnecessary if you eat enough whole foods.

Whey protein supplementation (60g/day) combined with resistance exercise significantly increases muscle mass and selective muscular strength/endurance compared to placebo, even when total caloric and macronutrient intake from meals is strictly controlled.

If you are doing resistance training, adding 60g of whey protein daily (split into 3 doses) can help you build more muscle and strength than training and eating a controlled diet alone. This benefit exists even if you are already eating enough calories and protein from your regular meals, suggesting the specific properties of whey (fast absorption, high essential amino acids) provide an extra edge.

Improving adherence to DASH or Healthy Eating Index (HEI) dietary patterns in young adults (ages 17-22) significantly reduces the risk of developing prediabetes or type 2 diabetes over a 4-year period.

If you are in your late teens or early twenties, focusing on improving your overall diet quality—specifically by following DASH or HEI guidelines—can significantly lower your risk of developing prediabetes. You don't need a perfect diet; even small, consistent improvements in your score (like eating more vegetables, whole grains, and less sodium/sugar) over a few years can reduce your risk of prediabetes by up to 64% if you improve your DASH score. This is a critical window to establish healthy habits before metabolic issues become entrenched.

Prioritizing whole or natural foods over highly or ultraprocessed foods is highly recommended for weight management and metabolic health.

Choose whole or natural foods over highly or ultraprocessed options. This recommendation is based on evidence that ultraprocessed foods lead to significantly higher calorie consumption (approx. 500 kcal/day more) compared to unprocessed foods, making weight management much harder.

Dietary composition should favor complex carbohydrates over simple sugars and be enriched in monounsaturated and polyunsaturated fatty acids rather than saturated fats.

Optimize your macronutrient quality by choosing complex carbohydrates (e.g., whole grains, vegetables) over simple sugars, and prioritizing monounsaturated and polyunsaturated fats (e.g., olive oil, nuts, fish) over saturated fats. This composition is supported by abundant evidence for metabolic health.

High-protein diets promote long-term weight loss and prevent weight regain by increasing satiety, enhancing metabolic rate, and altering gut microbiota to favor beneficial species (Akkermansia, Bifidobacterium), while also upregulating tight junction proteins like occludin and ZO-1.

Increasing protein intake to about 18% of your daily calories can help you lose weight, keep it off, and strengthen your gut barrier. It changes your gut bacteria to be healthier and increases satiety. If you have kidney issues, talk to a doctor first.

Indoor team sport athletes (volleyball, basketball, handball, futsal) consistently fail to meet official nutritional recommendations, specifically exhibiting significant under-consumption of energy and carbohydrates alongside over-consumption of fats.

If you play indoor team sports, you are likely eating too much fat and not enough carbs or total calories, even if you feel you are eating 'healthy'. To optimize performance, you must prioritize carbohydrate intake to match your high-intensity demands and ensure total energy intake meets your expenditure to preserve muscle mass.

A daily protein intake of 1.6 g/kg body weight is sufficient to maximize gains in lean mass, muscle strength, and performance during both resistance training and concurrent training in healthy, resistance-trained males, with no additional benefit observed at 3.2 g/kg.

If you are a healthy male who lifts weights regularly, aim for 1.6 grams of protein per kilogram of body weight every day. Spread this out over 4-7 meals, ensuring each meal has 20-40 grams of protein. You do not need to eat double that amount (3.2 g/kg) to get bigger or stronger; studies show it offers no extra benefit for muscle growth or strength, though it might slightly help peak power in pure strength training. Stick to 1.6 g/kg, train consistently, and you will maximize your results without unnecessary digestive stress or excess calories.

High-quality protein-based multi-ingredient supplementation (MIS) containing whey/casein, creatine, vitamin D, calcium, and fish oil significantly mitigates anabolic resistance in obese older adults, whereas low-quality protein (collagen) fails to support lean mass or strength gains despite matching total protein intake.

For older adults with excess body fat, simply eating enough protein is not enough to build muscle. You need high-quality protein sources (whey/casein) that are rich in leucine and essential amino acids. Combining this with creatine, vitamin D, and omega-3s is significantly more effective than using low-quality proteins like collagen, even if the total protein grams are the same.

Animal-based proteins are consistently scored higher in quality than incomplete plant-based proteins, making them more effective for stimulating tissue anabolism in clinical or single-source meal contexts.

If you rely on plant proteins, you may need to eat more of them or combine different sources to get the same muscle-building benefit as animal proteins. Animal proteins (meat, dairy, eggs) are naturally more efficient at stimulating muscle growth.

Mediterranean and Vegetarian diets are effective for weight loss and cardiovascular risk reduction, with Vegetarian diets potentially lowering LDL cholesterol more effectively and Mediterranean diets lowering triglycerides more significantly.

Both Mediterranean and Vegetarian diets are effective for weight loss and heart health. If your main concern is high LDL cholesterol, a Vegetarian diet may be slightly more effective. If you are focused on lowering triglycerides, the Mediterranean diet may offer a greater benefit. Choose the one you can sustain.

Consumption of hyperprocessed foods contributes to the epidemic of obesity, diabetes, and cardiovascular disease, with risk increasing proportionally to consumption levels.

Minimize the intake of hyperprocessed foods, defined as industrial formulations with five or more ingredients. Focus on whole or minimally processed foods. Reducing consumption of these items is directly linked to lower risks of diabetes and cardiovascular disease.