Browse the evidence

Supplementing resistance training with defatted peanut protein (35g protein/day) significantly increases vastus lateralis muscle thickness and knee flexion torque in older, untrained adults compared to resistance training alone.

If you are over 50 and new to resistance training, adding 35 grams of defatted peanut protein daily to your routine can help you build more muscle in your thighs and increase your knee flexion strength compared to training alone. Stick to a twice-weekly full-body resistance training program focusing on progressive overload.

When protein intake is matched for quantity and leucine content, plant-based protein supplements produce equivalent gains in muscle mass and strength compared to animal-based protein supplements during resistance training.

If you are training to build muscle, you do not need to buy expensive animal protein powders. You can use plant-based proteins (like soy, pea, or rice) and get the same results, provided you consume enough total protein and ensure the supplement provides a similar amount of leucine as animal sources. Match the dose (e.g., ~25g protein) and train consistently.

Post-exercise ingestion of 1.2 g/kg/hour of carbohydrates for 6 hours, combined with 0.2-0.4 g/kg/hour of protein, optimizes glycogen restoration and muscle recovery in athletes, mitigating the risk of Overtraining Syndrome.

After intense training, prioritize eating carbohydrates immediately. Aim for 1.2 grams of carbs per kilogram of body weight each hour for the next 6 hours. Include 10-20 grams of high-quality protein in the first hour. Also, drink enough fluids to replace 150% of the weight you lost during exercise over those 6 hours.

A high-protein diet (1.4-2g/kg body weight) supports muscle repair, lean body mass gains, and strength improvements in resistance-trained individuals, with animal proteins potentially offering superior lean mass benefits compared to plant proteins.

If you lift weights, aim for 1.4 to 2 grams of protein per kilogram of body weight daily. This supports muscle repair and strength gains. While animal proteins may offer a slight edge in lean mass for younger adults, plant proteins are also effective, especially if your baseline intake was previously low.

Balanced macronutrient intake (1.6-2.2g protein/kg, 4-6g carbs/kg) results in significantly greater strength gains (12.5%) and faster recovery (24 hours) compared to protein or carbohydrate deficits.

Eat a balanced diet with 1.6-2.2g of protein per kg of body weight and 4-6g of carbohydrates per kg. This supports maximum strength gains and faster recovery (24 hours) compared to restricting either nutrient.

Whey protein is the only protein source shown to have statistically significant effects on both endurance performance and muscle strength in this meta-analysis.

If you use protein supplements for performance, whey protein is the only source with demonstrated significant benefits for both endurance and strength in this analysis. Other sources (soy, casein, etc.) did not show significant effects.

Higher protein intake is significantly associated with greater hand muscle strength in adolescent karate athletes, whereas energy, fat, and carbohydrate intake are not.

For adolescent karate athletes, ensuring adequate protein intake is more critical for hand strength than simply eating enough total calories or focusing on carbs/fat. While knowing nutrition is good, it doesn't replace the need for specific nutrient intake and training. Focus on distributing protein intake throughout the day to support muscle protein synthesis alongside training.

High protein intake combined with physical rehabilitation improves muscle mass retention and functional recovery in patients undergoing ACL reconstruction.

If you are recovering from ACL surgery, ensure your diet includes adequate protein alongside your physical therapy. This combination is associated with better muscle retention and functional recovery, though more high-quality research is needed to define exact dosages.

Carbohydrate intake of 3–12 g/kg/day, adjusted for exercise duration and intensity, is recommended for athletes with diabetes to optimize glycogen storage and performance.

As a diabetic athlete, you need carbohydrates to perform. Aim for 3 to 12 grams of carbohydrates per kilogram of your body weight each day. If you train for a long time or at high intensity, aim for the higher end of this range. This helps store glycogen in your muscles and liver, which is your main energy source during exercise. Monitor your blood sugar to see how your body responds to different amounts.

Adherence to low-calorie, low-carbohydrate, low-fat, or low-sodium diets is significantly associated with improved anthropometric indicators (BMI, waist circumference, waist-to-hip ratio, body fat/muscle composition) in Moroccan adults.

If you have high blood pressure, diabetes, or high cholesterol, adopting a diet that restricts calories, carbohydrates, fat, or sodium (as defined by your doctor) is associated with better body composition and lower cardiovascular risk. Focus on the specific restriction relevant to your condition (e.g., low sodium for hypertension).

Adherence to a ketogenic diet (KD) for 1.5–3 months in overweight/obese women leads to statistically significant reductions in BMI categories (overweight/obesity) and body weight, with 75% of users reporting successful weight loss goals.

If you are overweight and considering a ketogenic diet, expect significant weight loss and BMI reduction within 1.5 to 3 months. Most users succeed, but be prepared for potential side effects like fatigue or 'keto flu' during the first few weeks. Supplementing with electrolytes (sodium, potassium, magnesium) is common and may help. Since most users do this without medical advice, consider consulting a professional to check for contraindications.

Randomized clinical trials demonstrate that dietary interventions (specifically low-carbohydrate or high-fiber diets) and physical activity significantly improve insulin sensitivity in obese individuals.

To improve insulin sensitivity, prioritize limiting carbohydrate intake and increasing dietary fiber through whole grains, vegetables, and legumes. Combine this with regular physical activity, as these are the most prominent intervention strategies found in recent clinical trials for obesity and insulin resistance.

Immediate post-exercise protein intake (within 5 minutes) significantly enhances skeletal muscle hypertrophy and strength gains in elderly men compared to delayed intake (2 hours post-exercise) during resistance training.

If you are an older adult doing resistance training, consume a small protein-rich snack (approx. 10g protein) within 5 minutes of finishing your workout. Waiting 2 hours or more may prevent muscle growth, even if you eat enough protein overall during the day.

Strength-power athletes should consume 4–7 g/kg/day of carbohydrates, prioritizing strategic timing around training sessions over high total daily volume.

Eat 4 to 7 grams of carbs per kilogram of body weight every day. Don't obsess on hitting 10g/kg. Instead, make sure you eat carbs before, during, and after your heaviest workouts to keep your energy up and muscles full. This matters more than just eating a huge amount of food all day.

Adherence to a very low-carbohydrate diet (VLCD) of approximately 36g carbohydrates per day in individuals with Type 1 Diabetes Mellitus (T1DM) results in exceptional glycemic control (mean HbA1c 5.67%) with low rates of adverse events, including hypoglycemia and diabetic ketoacidosis (DKA).

If you have Type 1 Diabetes, adopting a very low-carbohydrate diet (around 30-40g carbs daily from fibrous vegetables and nuts) can significantly improve your average blood sugar (HbA1c) to near-normal levels. This approach requires careful insulin adjustment, particularly reducing total daily insulin doses, but may result in fewer severe hypoglycemic events and hospitalizations compared to standard high-carbohydrate diets. Consult your healthcare provider to adjust your insulin regimen safely.

Consuming 4-5 protein boluses per day, with one near training and one before sleep, optimizes muscle protein synthesis without requiring precise peri-workout carbohydrate timing.

Eat 4-5 meals with protein throughout the day. Make sure one of these meals is within 1-2 hours of your workout and another is within 1-2 hours before you go to sleep. You do not need to rush to consume carbohydrates immediately after training; total daily protein and overall meal distribution are more important.

Low-carbohydrate diets (5-25% energy from carbs) improve cardiometabolic markers (weight, waist circumference, HDL, triglycerides) in healthy adults, with greater carbohydrate restriction yielding larger improvements in lipid profiles despite similar weight loss.

Adopting a low-carbohydrate diet (15-25% of calories from carbs) for 12 weeks can significantly improve your metabolic health markers, including weight, waist size, and blood lipids (specifically raising good HDL cholesterol and lowering triglycerides). You do not need to go to extreme ketosis (5% carbs) to see benefits; moderate restriction is easier to maintain and still yields superior lipid improvements compared to higher carb intakes, all while eating enough calories to maintain your usual energy levels.

Ingesting 30g of protein from whole food sources (e.g., beef, eggs, milk) post-exercise effectively stimulates muscle protein synthesis rates, providing a viable alternative to isolated protein supplements.

Eat 30g of protein from whole foods (like 4.5oz of chicken/beef, 3 cups of milk, or 5 eggs) after your workout. You don't need a shake; whole foods work just as well for building muscle and give you extra vitamins and fullness.

Concentrated Whey Protein (WPC) with 51-80% protein content is specifically effective for fat mass loss, whereas Hydrolyzed (WPH) and Isolated (WPI) forms did not show statistically significant fat loss effects in subgroup analyses.

If you are using whey for fat loss, Concentrated Whey (WPC) with 51-80% protein content appears to be the most effective form. Isolated or Hydrolyzed whey did not show significant fat loss benefits in this specific subgroup analysis.

A well-designed vegan diet is compatible with peak athletic performance, including aerobic capacity, anaerobic performance, and muscle strength, when properly supplemented.

If you are an athlete, a well-designed vegan diet can support peak performance. Ensure you supplement with Vitamin B12, Vitamin D, EPA/DHA, creatine, and vegan protein. This combination, along with resistance training, can preserve and increase muscle mass.

Ensuring adequate protein intake at every eating occasion is essential to prevent loss of lean body mass and malnutrition during rapid weight loss induced by GLP-1 RAs.

Because GLP-1 medications suppress appetite, you may struggle to eat enough. Prioritize protein at every meal to protect your muscles. If you can only eat small amounts, choose high-protein foods. Consider liquid protein sources if solid food is unappealing.

Completely plant-based diets scaled to meet the high caloric demands of resistance training provide sufficient protein (1.8 g/kg/day) and leucine (2.75 g/meal) to maximize muscle hypertrophy and strength in male bodybuilders without the need for protein supplements.

If you are a male bodybuilder doing resistance training, you do not need protein supplements to build maximum muscle if you eat a whole-food, plant-based diet. Simply eat enough calories to support your training volume (a caloric surplus). This will naturally provide enough protein (approx 1.8g per kg of body weight) and leucine (approx 2.75g per meal) to maximize muscle growth. Focus on legumes, grains, and nuts to hit these numbers.

A whole-foods, plant-based (WFPB) dietary intervention significantly improves BMI, systolic blood pressure, total cholesterol, and LDL levels in patients with metabolic disease in underserved communities.

Adopt a whole-foods, plant-based diet through a structured program involving weekly group visits and cooking demos. Focus on high-fiber, low-fat plant foods without eliminating any food categories entirely. Aim for 90-95% of calories from plants, moving at your own pace. This approach has been shown to significantly lower BMI, blood pressure, and cholesterol in underserved populations, even when meals cost less than $3 per serving.

Post-exercise consumption of 20–30 g of fast-digesting protein (e.g., whey) maximizes muscle protein synthesis and accelerates recovery in weightlifters.

After your weightlifting session, consume 20-30 grams of whey protein within 30 minutes. This specific amount and fast-absorbing source are identified as optimal for triggering muscle protein synthesis and speeding up recovery.