Browse the evidence

Habitual consumption of sugar-sweetened beverages (SSBs) causes weight gain and increases the risk of type 2 diabetes, cardiovascular disease, and all-cause mortality.

To prevent age-related weight gain and reduce chronic disease risk, limit or eliminate sugar-sweetened beverages. Replacing SSBs with non-caloric options (water, unsweetened tea/coffee) has been shown to reduce body weight, particularly in individuals with overweight or obesity. Be aware that liquid calories from soda do not make you feel full, so you are likely to consume these calories on top of your normal food intake.

Replacing SSBs with non-caloric beverages reduces body weight and BMI gain, especially in children and individuals with overweight or obesity.

If you want to lose weight or prevent weight gain, swap your sugary drinks for water or unsweetened alternatives. This is particularly effective if you have excess weight. You do not need to eliminate all sugar from your diet, but removing liquid sugar is one of the most impactful single changes you can make.

Higher body mass index (BMI) and larger waist circumference are independently associated with an increased prevalence of new diabetes in adults, with each standard deviation increase in BMI and waist girth significantly raising the risk.

To lower your risk of developing diabetes, focus on maintaining a healthy weight and waist circumference. This study shows that higher BMI and larger waist size are directly linked to a higher risk of new diabetes cases. Managing these factors through lifestyle changes is a crucial step in prevention.

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.

An intensive lifestyle intervention (ILI) involving caloric restriction and increased physical activity is associated with partial or complete remission of type 2 diabetes in overweight adults, particularly those with shorter disease duration, lower baseline HbA1c, and no insulin use.

If you have type 2 diabetes, especially if it was diagnosed recently and you are not yet on insulin, an intensive lifestyle program focusing on significant weight loss (1200-1800 calories/day) and regular exercise (175 minutes/week) can potentially put your diabetes into remission. This means your blood sugar levels may return to normal without medication. However, this requires sustained effort, and success is most likely if you act early in the disease process.

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.

Physical activity of 45-60 minutes per day is required to maintain weight loss and prevent weight regain, whereas 30 minutes is sufficient for cardiovascular protection but not necessarily weight maintenance.

If you have lost weight, aim for 45-60 minutes of moderate physical activity daily to prevent regaining it. Standard 30-minute recommendations may be insufficient for long-term weight maintenance.

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.

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-wheat fiber and inulin-propionate ester supplementation can reduce weight gain and improve body composition in overweight adults over long-term (24 weeks) interventions.

If you are overweight, try adding high-wheat fiber or inulin-propriate ester supplements to your daily routine for at least 24 weeks. This has been shown in human trials to significantly reduce weight gain and improve body composition, likely by making you feel fuller and reducing your overall energy intake.

Daily moderate-intensity aerobic exercise (approx. 500 kcal/session) for 14 weeks significantly reduces total, abdominal, and visceral fat in obese women, even when caloric intake is adjusted to maintain body weight (exercise without weight loss).

Perform daily moderate-intensity aerobic exercise (like brisk walking or jogging) for about 60 minutes, aiming to burn roughly 500 calories per session. You do not need to restrict your calories to see fat loss. Even if you eat enough to maintain your weight, this exercise routine will significantly reduce your total and abdominal fat over 14 weeks. Focus on waist size and how you feel, not just the number on the scale.

Exercise-induced weight loss is superior to diet-induced weight loss for reducing total fat, abdominal fat, and improving insulin sensitivity in obese women.

If you are trying to lose weight, combining exercise with a moderate caloric deficit is more effective for fat loss than dieting alone. Specifically, exercise helps you lose more total and abdominal fat while preserving muscle mass. Aim for daily aerobic exercise burning ~500 calories alongside a modest caloric reduction.

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.

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

If you are an athlete experiencing missed periods or low bone density, the most critical step is to eat more and/or train less to fix your energy deficit. Do not rely on your weight staying the same as a sign of health; you can be 'weight stable' but still be starving your body physiologically. Aim to increase your daily calories by 20-30% gradually (adding 200-600 calories) and consider reducing training volume if necessary. Expect menstrual cycles to return within months, but understand that bone density improvements may take years. Work with a sports dietitian and physician.

Preoperative weight loss via low-calorie or very low-calorie diets reduces postoperative complications and surgical complexity in bariatric surgery patients.

If you are scheduled for bariatric surgery, follow your surgeon's preoperative diet instructions strictly. This typically involves eating 800-1200 calories a day for 2-4 weeks before the operation. This is not just about weight loss; it shrinks your liver, making the surgery safer and reducing the risk of complications.

Regular participation in moderate-intensity physical activity (e.g., walking, gardening) for at least 30 minutes per day on most days provides significant health benefits and chronic disease protection in older adults, independent of improvements in maximal aerobic fitness.

For older adults, aim for 30 minutes of moderate activity on most days. This can be broken into shorter bouts (e.g., 10 minutes) and includes activities like brisk walking, gardening, or climbing stairs. You do not need to reach exhaustion or improve your maximum fitness to gain significant protection against chronic disease and mortality.

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.

Weight reduction effectively lowers blood pressure in obese hypertensive individuals, improving prognosis and potentially normalizing blood pressure levels.

Losing weight is one of the most effective ways to lower high blood pressure. Clinical data shows that losing significant weight (e.g., 30+ lbs) can drop systolic pressure by 30+ mmHg. The key is not just losing the weight, but keeping it off, as regaining weight causes blood pressure to rise again.

High-protein diets increase energy expenditure (thermogenesis) primarily through the ATP costs of protein synthesis, urea synthesis, and gluconeogenesis, with complete proteins potentially inducing a larger increase than lower-quality proteins.

Eating more protein slightly boosts your metabolism because your body uses more energy to process it. This effect is real but modest compared to the benefit of feeling fuller. Don't rely on this 'thermic effect' alone for weight loss, but view it as a helpful bonus.

High body mass index (BMI ≥ 30) and abdominal obesity are among the top five leading risk factors for global disease burden and mortality, driving the metabolic syndrome which significantly increases the risk of cardiovascular disease and type 2 diabetes.

Recognize that obesity is a major public health driver, not just a personal issue. Focus on systemic changes like policy shifts and environmental modifications rather than blaming individuals. For personal health, understand that high BMI is a top risk factor for heart disease and diabetes, so weight management is critical for long-term survival.

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.

Daily ingestion of 583 mg of green tea catechins for 12 weeks significantly reduces body fat mass, visceral fat area, and LDL cholesterol in humans with visceral fat-type obesity, independent of changes in usual diet or physical activity.

If you have visceral obesity, drinking a beverage providing ~583 mg of catechins daily (approx. 1.7 cans of the specific high-catechin extract used) for 12 weeks, while maintaining your usual diet and exercise, may help reduce body fat and LDL cholesterol. This is not a magic bullet but a supportive intervention.

Modest weight reduction (5-10%) achieved through lifestyle interventions, pharmacotherapy, or bariatric surgery improves glycemic control and reduces type 2 diabetes risk.

You do not need to lose a massive amount of weight to see health benefits. Losing just 5-10% of your body weight through lifestyle changes, medication, or surgery can significantly improve your blood sugar control and lower your risk of developing type 2 diabetes. Focus on sustainable, modest losses rather than extreme measures.

There is a dose-response relationship between the amount of exercise performed per week and long-term weight loss in overweight women, with >200 min/week yielding significantly greater loss than <150 min/week.

To lose more weight, aim for more than 200 minutes of exercise per week. You can achieve this by breaking your workouts into shorter sessions throughout the day, which is easier to fit into a busy schedule.