Browse the evidence

Very low energy diets (VLED) and formula meal replacements produce significantly greater weight loss in adults with type 2 diabetes compared to standard low-energy or low-fat diets.

If you have type 2 diabetes and want maximum weight loss, using a structured Very Low Energy Diet (400-500 kcal/day) or formula meal replacements for 8-12 weeks is more effective than standard low-fat or low-carb diets. This approach creates a larger caloric deficit than self-selected food diets, leading to roughly 6.6 kg more weight loss.

Interventions using a hypocaloric formula 'total diet replacement' induction phase are the most effective approach for achieving type 2 diabetes remission.

To maximize your chances of reversing type 2 diabetes, use a program that starts with a formula-based total diet replacement phase. This approach yields a 54% remission rate at one year, significantly higher than Mediterranean (15%) or ketogenic (20%) diets.

Weight loss of 3-9% body weight significantly reduces systolic and diastolic blood pressure in overweight individuals, with mechanisms involving reduced blood volume, cardiac output, and plasma renin activity.

If you are overweight, losing just 3-9% of your body weight can lower your blood pressure by about 3 mm Hg. This is achieved through a monitored program involving energy restriction and increased physical activity. You do not need to lose a massive amount of weight to see benefits, and this approach may also reduce the need for medication.

Intermittent very-low-calorie diet (VLCD) therapy (400-600 kcal/day for 1-5 days per week) combined with moderate caloric restriction produces significantly greater weight loss and improves glycemic control (specifically HbA1c normalization) in type 2 diabetes compared to moderate caloric restriction alone.

For individuals with Type 2 Diabetes who are overweight, incorporating short periods of very low-calorie intake (400-600 calories) into a weekly routine, alongside moderate calorie intake on other days, can lead to significantly greater weight loss and better blood sugar control than maintaining a moderate calorie diet alone. This approach requires strict adherence to the VLCD days, potentially supported by provided meals, and should be done under medical supervision.

Calorie-restricted interventions (CRI) significantly reduce liver enzymes (ALT, AST), hepatic steatosis, and liver stiffness in NAFLD patients, with a dose-response relationship between the degree of calorie restriction and clinical benefit.

For NAFLD management, establishing a consistent calorie deficit is the most effective first-line strategy. This approach reliably lowers liver enzymes (ALT/AST), reduces liver fat, and improves liver stiffness. While specific diet types (like Mediterranean) also help, the degree of calorie restriction directly correlates with liver benefits, making energy balance the primary lever for treatment.

Dynamic resistance training is safe and effective for patients with hypertension, provided the load is not too heavy and breath-holding is avoided.

If you have high blood pressure, you can safely do resistance training. Use moderate weights (enough to lift about 8 times), avoid holding your breath, and focus on smooth movements. This helps lower your blood pressure over time.

Physical activity alone produces modest body weight loss (<3% of initial body weight), but when combined with dietary restriction, it significantly enhances total weight loss compared to either intervention alone.

If your goal is significant weight loss, do not rely on exercise alone. The science shows exercise typically moves the needle by less than 3% of your body weight on its own. To see real results, combine physical activity with dietary changes. Exercise is most effective when it supports a caloric deficit, not when it stands alone.

Natural weight loss through diet and exercise can restore fertility and normal hormonal profiles in obese men.

Lose weight through diet and exercise. This can improve your hormone levels and sperm quality. Focus on sustainable changes.

Higher levels of nonsedentary physical activity (measured in MET-hours per week) are inversely associated with the risk of becoming overweight in adult men, with even moderate activity providing significant protection.

To prevent gaining excess weight, aim for at least 30 minutes of moderate physical activity daily, such as brisk walking or jogging. You do not need intense, prolonged exercise to see benefits; consistent, moderate movement significantly lowers your risk of becoming overweight over time.

Weight loss, particularly through bariatric surgery or lifestyle interventions, significantly reduces ectopic fat in the liver, pancreas, and heart, improving metabolic health.

Significant weight loss, whether through diet, exercise, or surgery, is effective at reducing harmful fat deposits in organs, leading to improved metabolic health.

Combined reduced-calorie diet and aerobic exercise interventions significantly improve pregnancy rates in overweight and obese women seeking fertility treatment compared to standard care or no intervention.

If you are overweight or obese and trying to conceive, combining a reduced-calorie diet with aerobic exercise is the most effective non-surgical way to increase your chances of pregnancy. Focus on reducing fat and refined carbohydrates while increasing physical activity. Note that while this improves pregnancy rates, it does not necessarily reduce the risk of miscarriage.

High intake of dietary fiber, particularly from whole grains, is associated with lower central adiposity, reduced weight gain, and improved insulin sensitivity.

Increase your intake of dietary fiber, specifically from whole grains, vegetables, fruits, and legumes. Aim for high-fiber whole foods rather than supplements. This helps control weight gain, reduces central adiposity (waist circumference), and improves insulin sensitivity.

Restoring energy availability through increased caloric intake and/or reduced exercise expenditure is the primary non-pharmacological intervention required to reverse menstrual dysfunction and improve bone health in female athletes with the Female Athlete Triad.

If you are a female athlete experiencing missed periods or low energy, your body is likely in 'survival mode' due to insufficient fuel relative to your activity. The most effective treatment is not medication, but increasing your food intake (specifically by 20-30% above your current baseline) and potentially reducing exercise volume. Aim for a daily energy availability of at least 45 kcal per kg of fat-free mass. This process takes time (often over a year) and requires working with a sports dietitian and physician to monitor weight gain and menstrual return safely.

Time-Restricted Feeding (TRF) restricts food intake to a specific window (e.g., 12 hours) and serves as an effective countermeasure to prevent obesity induced by circadian misalignment (shift work/jet lag) and high-fat diets.

Try eating all your meals within a 10-12 hour window each day (e.g., 8am to 8pm). This simple timing change can improve weight loss and metabolic health, especially if you work shifts or have erratic schedules, without needing to count calories.

Pre-cooling via cold water immersion improves endurance performance in hot environments by reducing heat stress and delaying thermally induced fatigue.

If you are competing in endurance events in hot weather, use cold water immersion (15-30 minutes) before the event to improve your performance by up to 6.6%. This strategy is less effective for short sprints.

For individuals with the same BMI, higher levels of physical activity are associated with a significantly lower body fat percentage, indicating that BMI alone does not fully capture adiposity differences driven by activity levels.

If you are physically active, you likely have less body fat than someone with the same BMI who is sedentary. Do not rely on BMI alone to assess your health or fat loss progress. Prioritize maintaining or increasing your physical activity (walking, moderate, and vigorous exercise) as it independently reduces body fat percentage, even if your total body weight remains stable.

A low-fat ad libitum diet promotes significant weight loss and greater LDL-C reduction compared to a low-fat diet under weight-maintenance conditions, without adverse effects on triglycerides or the TC/HDL-C ratio.

Adopt a low-fat diet (around 15% of calories from fat) without counting calories. Let your natural satiety signals guide you. You will likely eat less, lose weight, and significantly lower your LDL cholesterol without negatively impacting your triglycerides or overall heart disease risk markers.

Post-recovery weight maintenance in anorexia nervosa requires significantly higher caloric intake (50-60 kcal/kg/day) than healthy individuals (30 kcal/kg/day) for at least 3-6 months to prevent relapse.

After reaching your goal weight, do not immediately drop your calories to 'normal' levels. Your body still burns energy at a higher rate. You likely need 50-60 calories per kilogram of body weight daily for at least 3-6 months to prevent rapid weight loss and relapse. This high intake will gradually decrease as your metabolism normalizes.

Consuming 5.2g of viscous flaxseed dietary fiber daily as a drink significantly lowers fasting total and LDL cholesterol and increases fecal fat excretion in healthy adults.

To lower cholesterol and increase fat excretion using flaxseed fiber, consume it as a viscous drink (approx. 5.2g fiber/day) rather than baked into bread. The drink format preserves the viscosity required to interfere with bile acid reabsorption and fat digestion, leading to greater cholesterol reduction and fat excretion.

Weight loss, achieved through dietary changes or bariatric surgery, significantly improves GERD symptoms and endoscopic features.

If you have GERD and are overweight, losing weight is one of the most effective things you can do. You don't need to reach a 'perfect' weight; even modest loss can reduce symptoms. Focus on sustainable dietary changes or discuss surgical options with your doctor if appropriate.

Obesity (BMI > 25) is a major preventable cause of non-insulin dependent diabetes mellitus (NIDDM), with a higher population attributable risk than for coronary heart disease.

Maintaining a healthy weight (BMI < 25) is the most effective way to prevent type 2 diabetes. The risk of developing diabetes drops dramatically as you move away from overweight status.

Regular physical activity, including light-to-moderate leisure time activity, reduces the prevalence of the metabolic syndrome.

You do not need to run marathons to improve your metabolic health. Incorporate regular, light-to-moderate activity like brisk walking into your day. While more intense exercise offers greater benefits, any increase in movement helps reduce your risk.

Substituting low-calorie sweetened (LCS) beverages for sugar-sweetened beverages (SSBs) is an effective strategy to reduce energy intake and promote weight loss in adults, particularly habitual SSB consumers.

If you drink sugary sodas regularly, switching to diet or zero-sugar versions is a scientifically supported way to cut calories and lose weight. It works best if you use it to replace sugary drinks, not to add on top of them. If you have diabetes, this can help manage blood sugar spikes, but you should still prioritize water when possible.

Prescribed exercise (aerobic or resistance) significantly reduces intrahepatic triglyceride (IHTG) in NAFLD patients independent of significant weight loss or dietary intervention.

To reduce liver fat in NAFLD, engage in moderate-intensity exercise (aerobic or resistance) for 30-60 minutes, 3-7 times per week, for at least 8 weeks. You do not need to lose weight or change your diet to see benefits in liver fat content, although combining exercise with diet yields greater reductions. Focus on consistency and moderate intensity (45-75% VO2 peak) rather than extreme intensity or weight loss expectations.