Browse the evidence

Vitamin D supplementation reduces the incidence of respiratory tract infections, with protective effects being more pronounced with daily dosing compared to bolus doses.

Consider daily Vitamin D supplementation, especially if you have limited sun exposure. Meta-analyses suggest daily dosing is more effective than occasional large bolus doses for preventing respiratory infections.

Gradual weight reduction through diet, with or without exercise, improves serum liver enzymes, reduces hepatic fatty infiltration, decreases hepatic inflammation, and reduces fibrosis levels in NAFLD patients.

Focus on gradual weight loss through dietary changes and/or exercise. You do not need to achieve extreme weight loss or intense exercise levels to see benefits; even minimal exercise below obesity management recommendations can improve hepatic fatty infiltration. This approach addresses the root metabolic drivers of NAFLD.

Resistance exercise improves NAFLD and may be more tolerable for patients with poor cardiorespiratory fitness who cannot tolerate intense aerobic exercise.

If you struggle with intense cardio like running, try resistance training. It improves NAFLD and is often easier for people with low fitness levels to maintain consistently.

Caloric restriction and exercise training can reverse metabolic inflexibility by enhancing mitochondrial function and promoting the expression of key metabolic regulators like PGC1α and AMPK.

Regular exercise and controlled caloric intake are proven ways to improve your body's metabolic flexibility. Exercise triggers signals (like AMPK and PGC1α) that boost mitochondrial function and insulin sensitivity. Consistent application of these lifestyle factors can help reverse metabolic inflexibility associated with obesity and type 2 diabetes.

A Mediterranean diet supplemented with virgin olive oil or nuts reduces the progression to type 2 diabetes by approximately 50% compared to a conventional low-fat diet, independent of significant weight loss.

Adopt a Mediterranean dietary pattern, specifically ensuring you consume either 30 grams of nuts daily or 1 liter of virgin olive oil weekly. This specific supplementation has been shown in clinical trials to cut the risk of developing type 2 diabetes by half over four years, even without significant weight loss, likely due to anti-inflammatory and metabolic benefits of these specific foods.

Physical activity reduces type 2 diabetes risk by approximately 30% compared to low activity levels, primarily through improved insulin sensitivity and visceral fat reduction rather than total calorie expenditure.

Increase your total physical activity, specifically by reallocating 30 minutes of sedentary time (like watching TV or sitting at a desk) into moderate to vigorous movement. This specific change improves insulin sensitivity by 15% and reduces diabetes risk by 30%, independent of significant weight loss.

Resistance exercise combined with a protein intake of 1 to 1.5 g/kg/day is the primary management strategy for sarcopenia.

To fight age-related muscle loss, you must do resistance training and eat 1 to 1.5 grams of protein per kilogram of body weight every day. Don't rely on vitamin D or steroids as primary treatments, as evidence for their benefit in sarcopenia is lacking.

Replacing sitting time with vigorous physical activity (VPA) yields the largest reduction in cardiovascular disease mortality risk, particularly for individuals who sit more than 6 hours per day.

If you sit for more than 6 hours a day, try to replace some of that time with vigorous exercise (like running, fast cycling, or high-intensity interval training). This substitution offers the greatest protection against heart disease-related death. Even replacing sitting with brisk walking helps, but vigorous activity provides the strongest benefit for high sitters.

High sodium intake increases blood pressure and arterial stiffness through volume expansion, endothelial dysfunction, and sympathetic activation, whereas modest sodium reduction lowers BP and improves vascular health in hypertensive and salt-sensitive individuals.

If you have high blood pressure, reducing your sodium intake is one of the most effective steps you can take to lower it and protect your heart. However, if you have normal blood pressure, you don't need to obsessively restrict salt to near-zero levels, as extremely low intake may carry its own risks. Focus on reducing excess intake rather than eliminating it entirely.

The European Calcified Tissue Society recommends food fortification and routine Vitamin D supplementation for specific risk groups (infants, children, pregnant women, older persons, non-Western immigrants) to prevent deficiency.

If you are pregnant, older, a non-Western immigrant, or have young children, do not rely on diet alone. The ECTS recommends routine Vitamin D supplementation. Additionally, look for fortified foods like milk, bread, and cereals to help maintain your levels.

Increasing daily step count to 8,000 or more steps per day is significantly associated with lower all-cause, cardiovascular, and cancer mortality in US adults aged 40 and older, independent of step intensity.

To maximize longevity, aim for at least 8,000 steps per day. If you can reach 12,000, the mortality benefit is even greater. You do not need to walk fast or intensely; the total number of steps is the key factor. Start where you are and gradually increase your daily step count.

Weight loss through lifestyle modification in obese women restores menstrual cyclicity and ovulation, thereby improving the likelihood of conception.

Lose weight through diet and exercise. This is not just for health but specifically to restore ovulation and improve your chances of getting pregnant. The paper states this is proven to work.

Weight loss of 7-10% is the primary therapeutic target for NAFLD, as it resolves NASH in 65-90% of patients and improves fibrosis in 45% of patients.

To reverse fatty liver disease (NASH), you need to lose 7-10% of your body weight. Losing just 3-5% helps reduce liver fat, but you need the higher 7-10% range to resolve the inflammation and scarring. Focus on a Mediterranean-style diet and avoid snacking to achieve a steady loss of 0.5-1 kg per week.

Dietary fiber modulates gut microbiota composition and function, leading to the production of short-chain fatty acids (SCFAs) which improve glucose and lipid metabolism in individuals with metabolic diseases.

Increase your intake of diverse dietary fibers, particularly soluble and fermentable types like beta-glucan, inulin, and resistant starch. These fibers feed beneficial gut bacteria that produce short-chain fatty acids (SCFAs), which help regulate blood sugar and fat metabolism. Focus on whole plant foods rather than isolated supplements for best results, and introduce fiber gradually to minimize digestive discomfort.

Increasing daily step volume to approximately 4,400 steps is associated with significantly lower all-cause mortality compared to lower volumes (approx. 2,700 steps), with benefits continuing to increase until approximately 7,500 steps per day.

For older women, aiming for 4,400 steps a day provides significant mortality benefits compared to being sedentary. Increasing steps up to 7,500 a day yields progressively greater benefits. You do not need to force yourself to 10,000 steps to see health improvements; focus on reaching 4,400 first, then gradually increase toward 7,500.

Physical activity follows a dose-response relationship where even modest levels of activity are superior to being sedentary, reducing all-cause mortality risk.

Do not wait for the 'perfect' workout. Any amount of physical activity, even modest, reduces your risk of death compared to being sedentary. Start small.

Strength training provides specific health benefits, including improved balance, reduced fall risk, and positive impacts on endurance, previously associated primarily with aerobic exercise.

Include strength training in your routine. It improves balance, reduces fall risk, and can boost endurance, offering benefits beyond just muscle size.

Intensive, multicomponent behavioral interventions for adults with obesity (BMI ≥30) produce moderate net benefits by achieving clinically significant weight loss and reducing type 2 diabetes incidence, with small to no harms.

If you have a BMI of 30 or higher, ask your doctor for a referral to an intensive behavioral weight loss program. These programs typically involve at least 12 sessions in the first year and focus on diet, exercise, and self-monitoring. While the average weight loss is modest (around 2.4 kg or 5.3 lbs), these interventions significantly reduce your risk of developing type 2 diabetes and have very few side effects.

Incorporating walnuts (providing ~15% of energy) into a reduced-energy diet yields weight loss comparable to a standard reduced-energy-density diet while providing superior improvements in LDL cholesterol and systolic blood pressure.

To lose weight and improve heart health markers, you can include walnuts in your diet. Aim for about 1.5 ounces (42 grams) daily if you are eating more than 1500 calories, or 1 ounce (28 grams) if eating less. This amount provides about 15% of your daily calories. This approach helps you lose weight just as effectively as a standard low-calorie diet, but it may also lower your bad cholesterol (LDL) and blood pressure more effectively. Ensure you are still in a caloric deficit and staying active.

Intermittent fasting significantly reduces body weight, waist circumference, fat mass, BMI, systolic and diastolic blood pressure, total cholesterol, triglycerides, fasting blood glucose, fasting insulin, and insulin resistance (HOMA-IR) compared to control diets.

Intermittent fasting is an effective strategy for improving multiple cardiometabolic risk factors, including weight, blood pressure, and blood sugar control, compared to standard diets. However, it does not significantly improve HbA1c, LDL, or HDL cholesterol. To maximize benefits, choose a fasting protocol (like 16:8 or 5:2) that you can sustain, ensure you are not overeating during feeding windows to avoid muscle loss, and consult a healthcare provider, especially if you have existing health conditions.

Dietary fiber, specifically soluble gel-forming fiber, lowers blood cholesterol and reduces cardiovascular disease risk, and when added to statin therapy, doubles the efficacy of statins.

To support heart health and cholesterol levels, aim for the recommended daily fiber intake: 38 grams for men and 25 grams for women (ages 19-50). Prioritize soluble, gel-forming fibers found in oats, barley, beans, and fruits, as these are most effective at lowering cholesterol. If you are on statins, adding fiber may help them work better and potentially allow for lower doses, but consult your doctor before making changes.

Adhering to a low-fat vegan diet significantly reduces dietary acid load (measured by PRAL and NEAP), which is independently associated with greater reductions in body weight, fat mass, and visceral fat compared to a control diet, even after adjusting for energy intake.

To lose fat and improve metabolic health, focus on a whole-food, plant-based diet that is low in fat. This approach naturally lowers your dietary acid load, which the study links to better insulin sensitivity and greater fat loss than just counting calories. You don't need to count calories strictly, but you should avoid animal products and added oils, and ensure you take a B12 supplement.

High-intensity interval training (HIIT) and sprint interval training (SIT) enhance mitochondrial respiration and function, whereas long slow-distance (LSD) training with higher volume is required to increase mitochondrial mass.

To improve your aerobic capacity, you don't always need to spend hours exercising. Incorporate high-intensity interval training (HIIT) or sprint interval training (SIT) to boost mitochondrial function efficiently. If your goal is to increase the total amount of mitochondria (mass), focus on longer, lower-intensity sessions with higher volume.

Cycling as a mode of active commuting is associated with significantly lower risks of all-cause mortality, cardiovascular disease (CVD) incidence and mortality, and cancer incidence and mortality compared to non-active commuting.

If you can, cycle to work. This study links cycling to significantly lower risks of heart disease, cancer, and death. You don't need to be a pro; even mixed-mode commuting (cycling part of the way) helps. If cycling isn't possible, walking to work also reduces heart disease risk, especially if you walk longer distances.