Browse the evidence

Creatine monohydrate (CM) is the gold standard for efficacy, safety, and cost-effectiveness, while approximately 88% of alternative creatine products on the market have limited to no scientific evidence supporting their bioavailability, efficacy, or safety.

When buying creatine, look for Creatine Monohydrate. It is the most studied, safest, and cheapest option. Be wary of 'alternative' forms (like HCl, Ethyl Ester, etc.) as 88% of them lack scientific evidence for safety or effectiveness. Additionally, only 8% of products are third-party certified, so verify certifications if purity is a concern.

Short sleep duration (less than 5 hours per night) is significantly associated with an increased risk of obesity, with an odds ratio of 1.89 in children and 1.55 in adults.

Aim for 7-8 hours of sleep per night. Sleeping less than 5 hours significantly increases your risk of obesity. Prioritize sleep as a key component of your metabolic health strategy.

Obesity is a major independent risk factor for the development of coronary artery disease, heart failure, atrial fibrillation, and sudden cardiac death, with risk increasing linearly with BMI and visceral adiposity.

If you have excess body fat, especially around your midsection, your risk for heart disease, heart failure, and arrhythmias increases significantly, even if your blood pressure and cholesterol are normal. Do not rely on BMI alone; ask your doctor about assessing visceral fat or using waist circumference, as these are better predictors of heart risk.

Metformin and behavioral interventions produce beneficial weight loss in persons with serious mental illness (SMI), with high-strength evidence for both.

If you have a serious mental illness and are struggling with weight, combining metformin with behavioral lifestyle changes is a highly effective, evidence-based strategy. This approach directly addresses the metabolic risks that contribute to premature mortality in this population.

Structured, supervised exercise interventions provide mortality and morbidity benefits comparable to pharmacologic interventions for secondary prevention of coronary heart disease, stroke rehabilitation, heart failure treatment, and diabetes prevention.

For chronic conditions, exercise is a primary treatment, not just an adjunct. It reduces mortality and improves function as effectively as drugs. Consult a doctor for a tailored program.

For osteoarthritis of the knee, structured land-based exercise reduces pain and improves physical function with moderate effect sizes, comparable to or better than no-exercise controls.

Land-based exercise reduces knee OA pain and improves function. Supervised exercise is preferable.

Structured, supervised exercise training of at least 12 weeks duration reduces HbA1c levels in type 2 diabetes, with greater reductions seen at durations >150 minutes/week.

For type 2 diabetes, do structured, supervised exercise for at least 12 weeks. Aim for >150 minutes/week for greater HbA1c reduction.

Resistance training (RT) combined with a hypocaloric diet is more effective than endurance training (ET) or RT+ET combinations for altering body composition (loss of body mass and fat mass, retention of fat-free mass) and improving metabolic biomarkers (cholesterol, triglycerides, LDL, fasting insulin) in overweight/obese adults.

To lose fat and keep muscle while improving heart health, combine a calorie-reduced diet with resistance training. Lift weights 2-3 times a week, doing 2-3 sets of 6-10 reps at 75% of your one-rep max. This approach is superior to just doing cardio or just dieting for changing your body composition and blood markers.

A 4-year intensive lifestyle intervention (diet modification and physical activity) produces sustained weight loss and improvements in cardiovascular risk factors (fitness, glycemic control, blood pressure, HDL-C) in individuals with type 2 diabetes compared to usual care.

For individuals with type 2 diabetes, committing to a structured lifestyle program involving calorie-controlled meals (1200-1800 kcal/day) and at least 175 minutes of moderate exercise per week can lead to significant, sustained weight loss and improved cardiovascular health over several years. Consistency is key, with regular support and monitoring helping to maintain these benefits.

An intensive lifestyle intervention combining an energy-restricted Mediterranean diet (erMedDiet), physical activity promotion, and behavioral support significantly reduces body weight and improves cardiovascular risk factors in overweight/obese older adults with metabolic syndrome compared to usual care.

To lose weight and improve heart health, combine an energy-restricted Mediterranean diet with regular physical activity and behavioral support. Focus on reducing total calories while increasing healthy fats (olive oil, nuts) and protein. Attend regular support sessions to stay on track. This approach was shown to be more effective than usual care in older adults with metabolic syndrome.

A 5-year behavioral lifestyle intervention combining a modest weight loss goal (5-15 lb) with a low-fat, reduced-calorie diet (1,300 kcal/day) and increased physical activity (1,000-1,500 kcal/week) prevents menopausal weight gain and reduces waist circumference in healthy premenopausal women.

To prevent weight gain during menopause, adopt a long-term lifestyle change rather than a short-term diet. Aim for a modest weight loss (5-15 lbs) if you are overweight, or maintain your current weight if you are normal weight. Focus on eating fewer calories (around 1,300) with low fat, and increase your physical activity to burn 1,000-1,500 calories per week (e.g., brisk walking). Consistency over 5 years is key, and you may need periodic check-ins or refresher courses to stay on track.

A comprehensive lifestyle intervention targeting weight loss, dietary fat reduction, increased fiber intake, and moderate-to-high physical activity significantly reduces the incidence of type 2 diabetes in high-risk subjects with impaired glucose tolerance.

If you are overweight and have impaired glucose tolerance, you can significantly reduce your risk of developing type 2 diabetes by making comprehensive lifestyle changes. Focus on losing at least 5% of your body weight, reducing your total fat intake to less than 30% of your calories, limiting saturated fat to less than 10%, increasing fiber to at least 15g per 1000 calories, and engaging in at least 4 hours of moderate exercise per week. You don't need to be perfect; even small improvements across these areas can make a big difference.

Bariatric surgery (gastric bypass, vertical banded gastroplasty, or banding) produces sustained long-term weight loss and significantly improves or resolves type 2 diabetes, hypertension, hypertriglyceridemia, and hyperuricemia over a 10-year period compared to conventional non-surgical treatment.

For individuals with severe obesity (BMI >= 34 for men, >= 38 for women), bariatric surgery offers a proven, long-term solution for weight loss and improvement in major cardiovascular risk factors like diabetes and hypertension. Unlike conventional lifestyle interventions, which often fail to produce sustained weight loss, surgery leads to a significant and lasting reduction in body weight and a lower incidence of metabolic diseases over a 10-year period. While surgery carries risks, the long-term health benefits for eligible candidates are substantial and superior to non-surgical treatments.

Progressive resistance training for healthy adults requires periodized manipulation of load, volume, and intensity to overcome training plateaus and maximize strength, hypertrophy, power, and endurance.

To keep getting stronger or building muscle, you cannot do the exact same workout forever. Start with moderate weights (8-12 reps) for 2-3 days a week. Once you can easily do the top end of the rep range, increase the weight slightly (2-10%). As you get more advanced, vary your weights (some heavy, some light) and rest periods (longer for heavy lifts) to keep challenging your body. Don't just add reps forever; eventually, you must add weight.

Habitual sleep duration of less than 7 hours per night is associated with a 12% increased risk of all-cause mortality compared to the reference range of 7-8 hours.

Aim for 7-8 hours of sleep per night. Sleeping consistently less than 7 hours is associated with a 12% higher risk of death. While individual needs vary, this is a significant public health risk factor that should be prioritized alongside diet and exercise.

Focusing on overall diet patterns (e.g., Mediterranean or DASH) significantly reduces cardiovascular disease and diabetes risk, whereas focusing on isolated nutrient targets (e.g., low-fat or low-saturated fat) produces no significant clinical benefits.

Stop counting calories or obsessing over fat grams. Instead, build your meals around whole, minimally processed foods: vegetables, fruits, nuts, legumes, whole grains, and fish. Limit processed meats, refined grains, and added sugars. This pattern, like the Mediterranean or DASH diet, is proven to prevent heart disease and diabetes better than any single-nutrient restriction.

Bariatric surgery (gastric bypass or sleeve gastrectomy) combined with intensive medical therapy achieves significantly better glycemic control and greater weight loss than intensive medical therapy alone in obese patients with uncontrolled type 2 diabetes.

For obese individuals with uncontrolled type 2 diabetes, bariatric surgery (gastric bypass or sleeve gastrectomy) combined with intensive medical care is significantly more effective at achieving normal blood sugar levels and weight loss than intensive medical care alone. Surgery also reduces the need for diabetes, lipid, and blood pressure medications. While surgery carries risks, this study found no deaths or life-threatening complications at 12 months, suggesting it is a viable and superior option for achieving glycemic control in this population.

An intensive, individualized lifestyle intervention combining moderate-intensity physical activity and a diet reducing saturated fat and total energy intake significantly reduces the incidence of type 2 diabetes in high-risk individuals with impaired glucose tolerance.

If you are overweight and have impaired glucose tolerance, you can significantly lower your risk of developing type 2 diabetes by making specific lifestyle changes. Focus on losing more than 5% of your body weight, eating a diet with less than 30% of calories from fat (and less than 10% from saturated fat), and getting at least 30 minutes of moderate-intensity physical activity every day. Individualized counseling and support can help you achieve these goals.

Exercise-based cardiac rehabilitation significantly reduces total and cardiovascular mortality in patients with coronary heart disease when followed for 12 months or longer.

If you have coronary heart disease, participating in a structured exercise-based cardiac rehabilitation program for at least 12 months significantly lowers your risk of dying from heart-related causes. While it may not prevent heart attacks or the need for procedures like stents, it saves lives. Ensure you are referred to a program, as access can be difficult.

Increasing vegetable and fruit consumption reduces the risk of hypertension, coronary heart disease, and stroke, with evidence rated as convincing.

Aim to eat at least 5 portions of vegetables and fruit every day. This is one of the most effective dietary changes you can make to lower your blood pressure and reduce your risk of heart disease and stroke. Focus on variety and consistency rather than perfection.

Sleep deprivation significantly impairs human functioning, with partial sleep deprivation having a more profound negative effect on mood and cognitive performance than short-term or long-term total sleep deprivation.

Prioritize sleep duration and consistency. Partial sleep deprivation (sleeping less than 5 hours in 24 hours) is more damaging to your mood and cognitive abilities than staying awake for 45+ hours. Do not underestimate the functional cost of cutting sleep short; it degrades performance significantly.

High levels of leisure-time physical activity (90th percentile vs 10th) are associated with a significantly lower risk of 13 specific cancer types, including esophageal adenocarcinoma, liver, lung, kidney, gastric cardia, endometrial, myeloid leukemia, myeloma, colon, head and neck, rectal, bladder, and breast cancer.

Engaging in high levels of leisure-time physical activity (moderate to vigorous intensity, such as brisk walking or running) is strongly associated with a reduced risk of developing 13 common types of cancer, including breast, colon, lung, and kidney cancer. This benefit exists independently of weight loss for most cancers, meaning you should prioritize consistent physical activity for cancer prevention regardless of your current body weight.

Regular physical activity of varying intensities (from low-intensity walking to vigorous sports and resistance exercises) reduces the risk of major cardiovascular disease, metabolic disease, obesity, falls, cognitive impairment, osteoporosis, and muscular weakness in older adults.

Start moving regularly. You don't need to be a master athlete. Walking, resistance exercises, and even vigorous sports can improve your health, reduce disease risk, and help you stay independent. If you are frail, start with moderate intensity and build up. The key is consistency and safety, not extreme intensity. Talk to your doctor if you have concerns, but know that exercise is generally safe and beneficial for older adults.

Total physical activity reduces the risk of breast cancer, colon cancer, diabetes, ischemic heart disease, and ischemic stroke, with the majority of health gains occurring at lower activity levels (up to 3000-4000 MET minutes/week) and diminishing returns at higher levels.

Aim for at least 600 MET minutes of total physical activity per week, which is the current WHO minimum. This can be achieved through a mix of moderate (e.g., brisk walking) and vigorous (e.g., running) activities, as well as daily tasks like gardening or transportation. You will see the biggest drop in risk for heart disease, diabetes, and stroke by reaching 3000-4000 MET minutes/week. Going beyond this yields smaller additional benefits, so focus on consistency and incorporating activity into all parts of your day (work, home, travel) rather than just gym sessions.