Browse the evidence

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.

Acute caffeine ingestion (1.3–9 mg/kg) significantly improves 2000m rowing ergometer performance by approximately 4 seconds compared to placebo.

If you are a competitive rower, taking caffeine 60 minutes before a 2000m ergometer test can improve your time by about 4 seconds. Doses between 1.3 and 9 mg/kg per body weight are effective, but individual response varies, so test it in training first.

Combined diet and exercise interventions are superior to either intervention alone for improving cardiorespiratory fitness (peak VO2) and reducing body weight in overweight/obese breast cancer survivors.

If you are overweight or obese, combining a healthy diet with regular moderate-to-vigorous exercise is more effective for improving heart health and fitness than doing either alone. Aim for a caloric deficit alongside at least 150 minutes of weekly exercise to maximize weight loss and cardiorespiratory fitness gains.

GLP-1 receptor agonists (semaglutide, liraglutide, tirzepatide) produce clinically significant weight loss (8-24%) in obese patients, serving as an effective alternative to bariatric surgery for preoperative optimization in joint arthroplasty candidates.

GLP-1 agonists like Semaglutide (Wegovy/Ozempic) and Tirzepatide (Zepbound/Mounjaro) are highly effective for weight loss, achieving 15-20% body weight reduction in clinical trials. For patients with osteoarthritis, this weight loss can significantly reduce joint pain and improve surgical outcomes. If you are considering joint replacement, discuss these medications with your doctor as a potential bridge to surgery. Be aware that gastrointestinal side effects like nausea are common initially but often subside as your body adjusts to the medication. Oral versions are also available if you prefer to avoid injections.

Achieving a weight loss of 15% or more can reverse type 2 diabetes metabolic abnormalities and induce remission, an outcome not achievable with current glucose-lowering pharmacotherapies alone.

To potentially reverse type 2 diabetes, you need to lose a significant amount of weight—specifically 15% or more of your body weight (often around 10kg or more for many patients). This level of loss, achieved through intensive lifestyle changes like low-calorie diets, can reverse metabolic abnormalities in about half of patients within a year. Standard diabetes medications alone typically cannot achieve this reversal. The key challenge is maintaining this loss because your body will biologically fight back (metabolic adaptation), so long-term success requires sustained behavioral support and physical activity.

Modest weight loss of 3-5% yields clinically meaningful health benefits, but progressive weight loss beyond 15% is required for disease modification in T2D.

You do not need to lose 15% of your body weight to see health benefits. Losing just 3-5% of your weight produces clinically meaningful improvements. However, if your goal is to potentially reverse type 2 diabetes entirely, you need to aim for a larger loss of over 15%. Start with the smaller goal to get immediate health wins, then build toward the larger target.

Physical activity can significantly reduce the genetic risk of obesity, specifically by mitigating the effects of the FTO gene.

If you have a family history of obesity, regular physical activity is your most powerful tool to counteract your genetic risk. Aim for consistent activity to reduce your FTO gene's impact by nearly 30%.

Among adults with overweight or obesity and type 2 diabetes undergoing intensive lifestyle intervention, long-term abstinence from alcohol is associated with significantly greater weight loss compared to consistent heavy drinking, whereas short-term (1-year) weight loss is not significantly affected by alcohol consumption.

If you have type 2 diabetes and are trying to lose weight, your alcohol intake matters most for your long-term results (after 1 year). While you might lose weight in the first year regardless of drinking, heavy drinkers will struggle to maintain that loss over 4 years. Abstaining from alcohol helps you lose significantly more weight (5.1% vs 2.4%) in the long run because alcohol adds empty calories that don't make you feel full.

Adherence to a Mediterranean diet significantly reduces cardiovascular mortality, all-cause mortality, myocardial infarction, angina, and major cardiovascular events compared to control diets.

Adopting a Mediterranean-style eating pattern is the most effective dietary strategy for reducing the risk of heart-related death, heart attacks, and overall mortality. This involves eating more fruits, vegetables, nuts, fish, and olive oil, and less processed foods. While weight loss often accompanies this diet, the specific nutrients in these foods provide direct protection to your heart and blood vessels. It is superior to standard low-fat diets for these specific outcomes.

Low-load resistance training with blood flow restriction (LL-RT with BFR) produces muscle hypertrophy equivalent to high-load resistance training (HL-RT) across various repetition schemes (failure, 15 reps, or 75 reps) in lower limb exercises.

If you want to build muscle but cannot lift heavy weights due to injury or joint pain, try low-load resistance training combined with blood flow restriction (BFR). Use light weights (20-40% of your max) and restrict blood flow to the working muscle. You can use different repetition schemes (like 15 reps per set or going to failure), and you will likely build muscle just as effectively as if you were lifting heavy weights. This is particularly useful for rehabilitation or when heavy loading is contraindicated.

Once-weekly subcutaneous semaglutide 2.4 mg significantly improves weight-related quality of life (IWQOL-Lite-CT) and health-related quality of life (SF-36v2) compared to placebo in adults with overweight or obesity, independent of the magnitude of weight loss in some domains.

If you have obesity or overweight with related health issues, once-weekly semaglutide 2.4 mg, combined with lifestyle changes, significantly improves your quality of life, including physical function, mental health, and control over food cravings, compared to placebo. This benefit is sustained over time and is driven by fat loss rather than muscle loss.

Semaglutide 2.4 mg significantly improves control of eating, including craving control and craving for savory, sustained up to week 104, compared to placebo.

Semaglutide 2.4 mg helps you control your eating, including cravings for savory and sweet foods, with benefits sustained up to 104 weeks. This is achieved through once-weekly injections combined with lifestyle changes.

Acute supplementation with capsaicin or capsiate (typically 12 mg, 45 minutes pre-exercise) significantly enhances muscular endurance (volume load/repetitions to failure) in resistance training.

If you are doing resistance training, taking 12 mg of capsaicin or capsiate 45 minutes before your workout may help you squeeze out a few more reps or sets. This effect is likely due to reduced perceived effort (RPE) and potentially better muscle contraction mechanics. It does not appear to help with cardio/endurance tasks like running or cycling.

Expanded access to GLP-1 and GIP/GLP-1 receptor agonists (e.g., semaglutide, tirzepatide) for eligible populations could avert approximately 42,000 deaths annually in the US by reducing obesity-related mortality.

If you are eligible for GLP-1/GIP agonists based on BMI and comorbidities, expanding insurance coverage and manufacturing capacity could save tens of thousands of lives annually by reducing obesity-related mortality. Current barriers like cost and supply shortages prevent many from accessing these life-saving treatments.

Lifestyle interventions remain critical for optimizing body composition (preserving lean mass) and improving cardiovascular fitness, outcomes that AOMs alone do not fully address.

When using AOMs, prioritize protein intake and resistance/cardio exercise. This ensures you lose fat rather than muscle and improves your heart health, maximizing the 'quality' of the weight loss.

Achieving a total body weight loss of 5% or higher in individuals with type 2 diabetes and obesity significantly improves glycemic control (reducing HbA1c) and reduces the utilization of glucose-lowering medications.

If you have type 2 diabetes and are overweight or obese, aiming to lose at least 5% of your body weight is a critical first step. This modest loss can significantly improve your blood sugar levels and may allow you to reduce your diabetes medications. Focus on sustainable lifestyle changes involving diet, exercise, and behavioral support rather than just medication adjustments.

Achieving a total body weight loss of 10% or more in individuals with type 2 diabetes leads to progressive improvements in glycemic control and cardiometabolic risk factors, and may be necessary to reduce mortality.

If you have type 2 diabetes, aiming for 10% or more weight loss can provide even greater benefits for your heart health and longevity than the standard 5% goal. This may require more intensive lifestyle changes or medical support, but the potential to reduce cardiovascular events and death makes it a worthwhile target for many patients.

Lifestyle interventions involving caloric restriction and increased physical activity reduce the risk of incident chronic kidney disease in overweight or obese diabetic patients by 30% compared to standard education-based follow-up.

If you are overweight and have diabetes, combining a healthier diet with regular exercise can cut your risk of developing kidney disease by 30%. This is more effective than just receiving education about your condition. Focus on sustainable changes to lose weight and manage blood sugar.

Bodybuilding coaches consistently recommend Creatine and Fish Oils as top supplements, while recommending specific Performance-Enhancing Drugs (Testosterone, Primobolan, GH) for enhanced athletes, highlighting a significant gap between evidence-based supplementation and the lack of safety data for PEDs.

Creatine (3-10 g/day) and Fish Oils are the most recommended supplements by bodybuilding coaches. Creatine is well-supported for strength and muscle gains. Fish oils support general health and may mitigate lipid issues from PEDs. For enhanced athletes, coaches recommend Testosterone, Primobolan, and Growth Hormone, but there is limited safety data on these high-dose regimens in healthy athletes.

Adherence to a diet characterized by high Food Compass 2.0 scores (indicating encouragement of minimally processed foods, legumes, nuts, and seafood, and minimization of ultra-processed foods, added sugars, and artificial additives) is associated with significantly lower risks of cardiovascular disease, cancer, lung disease, metabolic syndrome, and all-cause mortality.

Use the Food Compass 2.0 framework to guide your food choices: prioritize foods scoring 70+ (like seafood, legumes, nuts, vegetables, and fruits), consume foods scoring 31-69 (like meat, poultry, eggs, and dairy) in moderation, and minimize foods scoring 30 or below (like sugary beverages, processed cereals, and many snacks). This approach focuses on nutrient density, fiber, and minimizing added sugars and artificial additives, rather than just avoiding 'processed' foods.

A multicomponent workplace-based Mediterranean diet intervention significantly improves adherence to Mediterranean diet principles in career firefighters over 12 months.

To improve your diet, don't just rely on knowing what to eat. Change your environment. Make healthy food cheaper and more available (discounts, samples). Get your family and coworkers involved. Use reminders and cooking demos to make the new habits easier to stick with over the long term.

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.

Fortifying plant-based protein blends with leucine to match the leucine content of whey protein stimulates muscle protein synthesis (MPS) to an equivalent extent as whey protein in young healthy adults.

If you are using plant-based protein, ensure it is fortified with leucine or is a blend designed to match the leucine content of whey protein. A 20g dose of such a fortified plant protein will stimulate muscle protein synthesis just as effectively as 20g of whey protein in young, healthy adults.

Combining GLP-1 receptor agonists (GLP-1RAs) with lifestyle modifications results in significantly greater weight loss and improved cardiometabolic biomarkers compared to lifestyle modifications alone in adults with overweight or obesity.

If you have overweight or obesity, combining a GLP-1 receptor agonist (like semaglutide or liraglutide) with lifestyle changes (calorie restriction and regular exercise) is significantly more effective for weight loss and improving heart health markers than lifestyle changes alone. To minimize muscle loss, ensure your lifestyle intervention includes resistance training. Consult a doctor to determine if GLP-1RAs are appropriate for you.