Browse the evidence

Adhering to the 2006 AHA Diet and Lifestyle Recommendations substantially reduces the risk of developing cardiovascular disease (CVD).

To significantly lower your risk of heart disease, focus on a balanced diet rich in vegetables, fruits, whole grains, and fish (at least twice a week). Limit saturated fats, trans fats, cholesterol, and sodium. Maintain a healthy weight by balancing calorie intake with regular physical activity (at least 30 minutes most days). Avoid tobacco and limit alcohol to 1 drink per day for women and 2 for men. These lifestyle changes are the most effective way to prevent cardiovascular disease.

Lifestyle modification (LSM) interventions significantly reduce diabetes incidence in adults at risk, and unlike medications, these effects are sustained for several years after the active intervention ends, although the magnitude of benefit declines over time.

Adopting combined diet and physical activity changes is the most effective long-term strategy for preventing diabetes in at-risk adults. While the protective effect diminishes slightly over many years, it remains significant (28% risk reduction) long after active counseling ends. To maximize longevity, focus on sustainable habits rather than short-term intensity, as the physiological benefits of weight loss and improved insulin sensitivity persist.

Laparoscopic Roux-en-Y Gastric Bypass (LGBP) induces a significant dietary shift towards lower fat intake and higher carbohydrate intake compared to Laparoscopic Vertical Banded Gastroplasty (LVBG), with approximately 30% of LGBP patients consciously avoiding fatty foods.

After LGBP surgery, patients naturally tend to reduce their fat intake, with about 30% consciously avoiding fatty foods due to post-meal discomfort. This behavioral shift contributes to the effectiveness of the surgery by reducing overall caloric density.

Long-term exercise produces a dose-dependent reduction in body weight and fat mass, refuting the media narrative that exercise nullifies energy expenditure through compensatory hunger.

Consistent, long-term exercise leads to weight loss proportional to the energy expended, regardless of whether you measure it in minutes or calories. Do not avoid exercise due to fears of compensatory hunger; the net result is fat loss.

Real-time remotely monitored exercise-based cardiac telerehabilitation (REMOTE-CR) is non-inferior to traditional centre-based cardiac rehabilitation in improving maximal oxygen uptake (VO2max) in adults with coronary heart disease.

If you have heart disease, you can get effective cardiac rehab at home using a remote monitoring system. It involves 3 sessions a week for 12 weeks, where you exercise while wearing a sensor that sends your heart data to a specialist who coaches you in real-time. This approach is just as good for improving your fitness (VO2max) as going to a clinic, and it saves money and travel time.

Heat acclimatisation (repeated exercise-heat exposures over 1–2 weeks) is the most important intervention to reduce physiological strain and optimise aerobic performance in hot ambient conditions.

If you are competing in the heat, you must spend 1-2 weeks training in the heat before the event. Do this daily. If you can't travel, use a sauna suit or hot room to simulate the heat. This is more important than any other strategy for performance.

Exercise-based cardiac rehabilitation significantly reduces the risk of fatal and/or non-fatal myocardial infarction in patients with coronary heart disease.

If you have coronary heart disease, engaging in supervised exercise-based cardiac rehabilitation is a highly effective way to lower your risk of having another heart attack. It is safe and recommended by major health organizations.

Higher leisure time physical activity is associated with a reduced risk of major adverse cardiovascular events (MACE) and all-cause mortality, whereas higher occupational physical activity is associated with increased risks of both outcomes.

Prioritize physical activity in your leisure time for heart health and longevity. Do not rely on your job's physical demands to protect your cardiovascular system, as high occupational activity may actually increase your risk of heart events and death. Aim for dynamic, conditioning-level exercise during free time, ensuring you have adequate recovery.

Adherence to the Mediterranean Diet (MedDiet) reduces the incidence of chronic non-communicable diseases (CVD, metabolic syndrome, cancer, cognitive decline) and all-cause mortality.

Adopt a Mediterranean-style eating pattern as your default long-term lifestyle. Prioritize plant-based foods (vegetables, fruits, legumes, nuts, whole grains), use extra virgin olive oil as your primary fat, eat fish and poultry moderately, limit red meat and sweets, and enjoy moderate wine with meals if you drink. Combine this with regular physical activity and social meals. This pattern is associated with the strongest evidence for preventing chronic diseases and extending healthy lifespan.

When resistance training sets are performed to volitional failure, muscle hypertrophy gains are similar across low, moderate, and high loads in untrained and recreationally trained individuals.

If you are new to lifting or have moderate experience, you do not need to lift heavy weights to build muscle. As long as you push your sets close to failure (where you can't do another rep with good form), lighter weights (high reps) will build muscle just as effectively as heavy weights (low reps). Focus on reaching that point of fatigue rather than obsessing over the specific weight.

Muscle strength gains are superior with high-load resistance training compared to low-load training, regardless of whether sets are performed to failure.

If your goal is to increase your maximum strength (e.g., lift heavier weights), you must use heavier loads (typically 80% of your 1-rep max or higher). While lighter weights will build muscle size, they will not make you as strong as heavy weights. Prioritize heavy loads for strength goals.

App-based mobile interventions significantly improve nutrition behaviors and nutrition-related health outcomes, including obesity indices, blood pressure, and blood lipids, with small-to-medium effect sizes.

Use a mobile app that tracks your food and provides feedback. Look for apps that use behavior change techniques like setting goals and providing social support. This approach has been shown to improve your diet and health markers like blood pressure and weight, even if the changes are gradual.

Cognitive-behavioral therapy for insomnia (CBT-I) is the first-line treatment for insomnia disorder, with hypnotics recommended only for short-term use when CBT-I is unavailable or ineffective.

If you have chronic insomnia, seek Cognitive-Behavioral Therapy for Insomnia (CBT-I) as your primary treatment. It is the gold standard recommended by all major medical guidelines. Use sleep medications only as a short-term bridge if CBT-I is not accessible, not as a long-term solution.

Adherence to a Mediterranean dietary pattern significantly reduces the risk of obesity, type 2 diabetes, cardiovascular disease, and cognitive decline compared to control or Western diets.

Adopt a Mediterranean-style eating pattern as your default. Prioritize fruits, vegetables, whole grains, legumes, nuts, and olive oil. Limit red and processed meats, refined grains, and added sugars. You do not need to count calories strictly; the quality of fats and plant foods drives the benefit. This pattern has been shown to reduce the risk of heart disease, type 2 diabetes, obesity, and cognitive decline in large-scale studies.

Creatine supplementation improves performance in strength and power events by increasing muscle creatine and creatine phosphate, but not all athletes benefit equally.

If you do strength or power sports, creatine is one of the few supplements with strong evidence for improving performance. Take 20g per day for 4-6 days, then 2-5g daily. It is safe and legal. Vegetarians may see greater benefits. Combine with carbs to enhance uptake.

Caffeine improves performance in endurance and high-intensity exercise through mechanisms involving reduced perception of fatigue and enhanced central drive, with benefits seen at low doses.

Caffeine can improve performance in endurance and high-intensity sports. Use 2-6 mg per kg of body weight. It works by reducing the perception of fatigue. Be aware of side effects like insomnia or GI distress, especially at higher doses. Habituated users may not experience significant diuretic effects.

Dietary supplements carry a risk of positive doping results due to contamination or inaccurate labeling, and athletes should consult sports nutrition professionals.

Always assume supplements may be contaminated with prohibited substances. Consult a sports nutrition professional. Use third-party tested products. The risk of a positive doping test is real.

Improving the availability of low-calorie beverages in the home environment decreases SSB intake and body weight in adolescents with overweight or obesity.

For families with overweight adolescents who drink a lot of soda, deliver or stock water and diet beverages at home. This simple environmental change has high-certainty evidence for reducing soda intake and body weight.

Obesity (BMI ≥30 kg/m²) is associated with a significantly higher risk of coronary heart disease (CHD) even in individuals who are metabolically healthy (no metabolic syndrome criteria), challenging the concept of 'metabolically healthy obesity' as a benign condition.

If you are obese, your heart disease risk is higher than if you were normal weight, even if your blood pressure, cholesterol, and blood sugar are normal. You should still pursue weight loss strategies (diet, exercise, or medical therapy) to reduce this risk, as metabolic health alone does not negate the dangers of excess adiposity.

Creatine monohydrate supplementation combined with resistance training increases strength, fat-free mass, and muscle morphology more than resistance training alone.

If you are lifting weights, take 5 grams of creatine monohydrate daily. You can skip the loading phase (20g/day for a week) if you prefer, but it will take longer (3-4 weeks) to saturate your muscles. This supplement is one of the most researched and effective ways to build strength and muscle mass when combined with resistance training.

Supervised exercise interventions significantly improve self-reported quality of life (QoL) and physical function (PF) in patients with cancer during and following treatment, whereas unsupervised exercise does not produce statistically significant benefits for these outcomes.

For cancer patients, supervised exercise programs provide a small but statistically significant boost to quality of life and physical function compared to usual care. If supervision is not possible, unsupervised exercise alone may not significantly improve these self-reported outcomes unless the weekly energy expenditure is kept high. Prioritize supervised programs when available.

Reducing dietary saturated fatty acid (SFA) intake significantly lowers plasma total and LDL cholesterol levels in healthy adults across diverse demographic subgroups.

To lower your LDL cholesterol, gradually replace saturated fats (found in meats, butter, full-fat dairy) with unsaturated fats and carbohydrates while keeping total calories and dietary cholesterol constant. Aim for a diet where saturated fats make up less than 10% of your total calories. This change is effective for men, women, and people of all races.

Aerobic exercise combined with behavioral weight loss reduces systolic and diastolic blood pressure more effectively than aerobic exercise alone in sedentary, overweight individuals with mild hypertension.

If you have mild hypertension and are overweight, combining regular aerobic exercise (3-4 times a week at moderate intensity) with a structured weight loss program will lower your blood pressure more effectively than exercise alone. Aim for a gradual weight loss of 0.5-1.0 kg per week through dietary changes while maintaining your exercise routine.

Roux-en-Y gastric bypass (RYGB) is the most effective bariatric procedure for producing safe short-term and long-term weight loss in severely obese patients.

For severe obesity, Roux-en-Y gastric bypass is considered the gold standard surgery. It typically results in losing 50-60% of your excess body weight and significantly improves or resolves conditions like Type II diabetes in up to 90% of patients. It requires lifelong vitamin supplementation and dietary changes to manage dumping syndrome.