Browse the evidence

Animal protein improves muscle mass compared to non-soy plant proteins (rice, chia, oat, potato) and plant-based diets, while soy protein is equivalent to milk protein for muscle mass.

If you are using plant protein, soy is just as good as animal protein for building muscle. Other plant proteins (rice, pea, oat, potato) may be less effective, so consider combining them or supplementing with soy or animal protein if muscle mass is a priority.

Multimodal interventions combining structured resistance and endurance exercise with adequate protein and caloric intake are effective for preventing and treating frailty in community-dwelling older adults.

For older adults with frailty, engage in a supervised, multimodal exercise program at least 2-3 times per week for 12 weeks or more. Combine resistance training (using weights or bodyweight, progressing to 20-85% of your one-rep max) with endurance activities (120-300 minutes of light-to-moderate activity weekly). Ensure your diet provides adequate calories and protein to support muscle repair. Consult a healthcare provider for a comprehensive assessment before starting.

Participation in organized sports significantly increases moderate-to-vigorous physical activity (MVPA) and total daily energy expenditure (TDEE) in male adolescents aged 13-16 compared to nonparticipants.

Encourage adolescents to join organized sports to boost their daily physical activity levels. While sport only makes up a fraction of total daily energy expenditure, it significantly increases moderate-to-vigorous activity, which is crucial for health. Be aware that participation often declines with age, so maintaining involvement is key.

Regular moderate-intensity physical activity reduces the incidence of type 2 diabetes by approximately 30%, with this benefit being largely independent of changes in body weight.

To lower your risk of type 2 diabetes, aim for regular moderate-intensity activity, such as brisk walking. You do not need to perform high-intensity workouts to see a significant reduction in risk (approx. 30%), and these benefits occur even if your body weight does not change significantly.

Reducing ultra-processed food intake after a colorectal cancer diagnosis is associated with lower cardiovascular disease mortality compared to maintaining or increasing UPF intake.

If you have had colorectal cancer, cutting back on ultra-processed foods after your diagnosis can significantly lower your risk of dying from heart disease. Even a moderate reduction (e.g., 2-3 servings per day less than before) is associated with better outcomes.

Combining incretin-based obesity medications (semaglutide/tirzepatide) with moderate lifestyle modification (150 min/week aerobic + 2 days resistance) yields sustainable weight loss and health benefits, making intensive behavioral therapy and strict caloric restriction redundant.

If you are prescribed semaglutide or tirzepatide, you do not need to follow a strict diet or exercise for hours every day. Aim for 150 minutes of moderate walking per week and two days of strength training. This moderate approach is sufficient to maintain weight loss and health benefits alongside your medication, whereas intensive protocols are likely unnecessary and harder to sustain.

Flaxseed oil (ALA) is an inefficient source of EPA and DHA due to low conversion rates, making direct supplementation with long-chain omega-3s (fish oil) necessary for most people.

If you want the benefits of EPA and DHA (brain, heart, inflammation), flaxseed oil is not enough because your body barely converts it. Eat fatty fish regularly or take a fish oil/algae oil supplement directly.

Losing obesity (achieving non-obesity status) after having been obese in young adulthood normalizes the risk of MASLD, at-risk MASH, and increased liver stiffness to levels comparable to those who were never obese.

If you were obese in your young adulthood but have since lost the weight to a non-obese range, your risk for serious liver conditions (like MASH and fibrosis) is likely the same as someone who was never obese. You do not need to worry about 'permanent' liver damage from your past obesity if you have achieved and maintained a healthy weight.

Semaglutide (GLP-1 receptor agonist) produces significant weight loss (15.5% in adolescents, 12.5% in adults) and cardiovascular benefits, making it a prioritized treatment for those with metabolic risk factors.

Semaglutide is a highly effective weekly injection that can lead to significant weight loss (12-15%) and cardiovascular benefits. It is particularly recommended for those with metabolic risks or low satiety.

A greater reduction in intrahepatic fat content (IFC) following a 6-month lifestyle intervention (Mediterranean diet and physical activity) is associated with improved oxidative stress and inflammatory status, specifically through increased catalase activity and reduced irisin and cytokeratin-18 levels, alongside better cardiorespiratory fitness.

For NAFLD patients, achieving a significant reduction in liver fat through a 6-month lifestyle program involving a calorie-restricted Mediterranean diet and regular physical activity (either high steps or interval training) leads to better oxidative stress and inflammatory profiles. Focus on adherence to the diet and increasing activity levels to maximize liver fat loss.

A low-carbohydrate, ketogenic diet (<20 g carbohydrate/day) produces significantly greater weight loss and improves lipid profiles (lower triglycerides, higher HDL) compared to a low-fat, reduced-calorie diet over 24 weeks in overweight, hyperlipidemic adults.

If you are overweight and have high cholesterol, switching to a very low-carb diet (under 20g carbs/day) for 6 months will likely result in nearly double the weight loss compared to a standard low-fat diet, while significantly improving your triglyceride and HDL levels. You do not need to count calories strictly, but you must avoid grains, sugars, and most fruits initially. Expect some initial side effects like fatigue or constipation, which can be managed with water, salt, and supplements. Monitor your LDL cholesterol, as a minority of people may see it rise.

Vegetarian and vegan diets provide sufficient protein and amino acids for adults when they include a variety of plant-based protein sources such as legumes, nuts, and seeds.

If you are eating a vegetarian or vegan diet, ensure you include protein-rich plant foods like legumes, nuts, and seeds in your daily meals. You do not need to obsess over combining specific proteins at every single meal; simply eating a variety of these foods throughout the day is sufficient to meet your protein and amino acid needs.

Adherence to the Mediterranean Diet (MedDiet) significantly reduces the risk of developing Metabolic Syndrome (MetS) and improves individual MetS criteria such as blood pressure and waist circumference.

Adopt a Mediterranean-style eating pattern as your primary dietary strategy for Metabolic Syndrome. Prioritize extra virgin olive oil, nuts, vegetables, fruits, and whole grains. Aim for 35-45% of calories from fat (mostly unsaturated), 35-45% from carbs, and 15-18% from protein. This pattern has been shown to reduce MetS risk by nearly 20% and improve blood pressure and waist circumference.

The DASH diet is the most effective dietary pattern for lowering blood pressure compared to other diets including low-fat, Nordic, and Paleolithic diets, and it significantly reduces the risk of developing Metabolic Syndrome.

Follow the DASH diet to manage blood pressure and reduce Metabolic Syndrome risk. Eat plenty of vegetables, fruits, whole grains, and low-fat dairy. Limit saturated fats to 6% of calories and sodium to under 2300 mg/day. This approach is more effective for blood pressure than low-fat diets.

Plant-based diets (vegetarian/vegan) reduce blood pressure and body weight, and lower the risk of Metabolic Syndrome, primarily through high fiber, antioxidant intake, and reduced consumption of red/processed meats.

Adopt a plant-based diet rich in whole grains, vegetables, legumes, nuts, and fruits. This reduces blood pressure, body weight, and Metabolic Syndrome risk. Avoid refined carbs, sugary drinks, and processed snacks to ensure the diet is truly healthy.

Moderate and sustained weight loss through combined diet, exercise, and lifestyle modifications improves blood glucose levels, insulin action, and reduces the need for diabetic medications in individuals with obesity and type 2 diabetes.

If you have obesity and Type 2 Diabetes, losing weight is the most critical step you can take to improve your health. You don't need a specific pill or extreme diet; focus on a sustainable combination of eating less, moving more, and changing daily habits. This approach directly improves how your body handles sugar and insulin, potentially reducing your need for medication.

Caffeine supplementation (typically 3-6 mg/kg) improves exercise performance across aerobic endurance, muscle strength, muscle endurance, power, jumping, and speed.

Take 3-6 mg of caffeine per kg of body weight before exercise. It works for almost all types of exercise, from running to lifting weights. Most studies used 6 mg/kg, but individual responses vary, so you might need to experiment.

Adherence to a Mediterranean Diet, particularly when supplemented with extra-virgin olive oil or nuts, significantly reduces the incidence of cardiovascular disease events and promotes the regression of metabolic syndrome compared to a low-fat diet.

Adopt a Mediterranean-style diet rich in vegetables, fruits, whole grains, fish, and healthy fats like olive oil and nuts. If you are at high risk for heart disease or have metabolic syndrome, this dietary pattern is clinically proven to reduce cardiovascular events and reverse metabolic issues more effectively than standard low-fat diets. Focus on consistency and quality of fats rather than just calorie counting.

High-load resistance training (>60% 1RM) is superior to low-load training for maximizing one-repetition maximum (1RM) strength gains, although significant strength gains can still be achieved with low loads if taken to failure.

To maximize your one-rep max, prioritize heavy loads (80-100% 1RM). However, if you cannot lift heavy due to injury or preference, you can still build substantial strength using lighter loads (below 60% 1RM) as long as you perform enough repetitions (15+) to reach muscular failure.

Sustained weight loss (8 weeks of 12% body weight loss followed by 1 year of maintenance) significantly reduces systemic inflammation and improves insulin resistance markers in obese individuals, with the majority of participants benefiting from these metabolic improvements.

For obese individuals, achieving a 12% body weight loss through a strict caloric deficit (800 kcal/day) for 8 weeks, followed by maintenance, leads to significant reductions in systemic inflammation and improved insulin resistance. This benefit is observed in nearly all participants, suggesting that sustained weight loss is a highly effective intervention for improving metabolic health markers, even if individual protein trajectories vary.

Increasing daily protein intake to ≥1.6 g/kg/day enhances lean body mass gains in healthy adults under 65 years old who perform resistance exercise, whereas older adults (≥65) achieve significant gains at lower intakes (1.2–1.59 g/kg/day).

If you are under 65 and lifting weights, aim for at least 1.6 grams of protein per kilogram of body weight daily to maximize muscle growth. If you are 65 or older, you may see significant muscle benefits with a slightly lower intake of 1.2 to 1.6 grams per kilogram. This assumes you are doing resistance exercise; protein alone without exercise has minimal impact on muscle mass in healthy adults.

A ketogenic diet (carbohydrate restriction <50g/day) promotes weight loss and visceral adiposity reduction by inducing nutritional ketosis, which suppresses appetite via beta-hydroxybutyrate (BHB) signaling and increases energy expenditure through fat oxidation.

To use this diet, restrict carbohydrates to under 50 grams per day (under 20g for therapeutic effects). Focus on healthy fats and moderate protein. Expect initial weight loss and reduced hunger due to ketone production. Monitor your progress with blood ketone levels (0.5-3.0 mmol/L) to ensure you are in ketosis.

Ketogenic diets improve glycemic control in Type 2 Diabetes patients by reducing carbohydrate intake, thereby lowering insulin levels and HbA1c, and reducing the need for insulin medication.

If you have Type 2 Diabetes, restricting carbs to under 30g/day can significantly lower your HbA1c and reduce your need for insulin. Work with your doctor to adjust medications as your blood sugar improves.

Walking for at least 30 minutes per day significantly reduces the risk of developing type 2 diabetes.

Walk for at least 30 minutes every day. You do not need to run or lift weights to significantly lower your risk of type 2 diabetes. Consistency is key.