Browse the evidence

Increasing daily servings of potato chips, potatoes, sugar-sweetened beverages, unprocessed red meats, and processed meats is independently associated with greater long-term weight gain, whereas increasing servings of vegetables, whole grains, fruits, nuts, and yogurt is associated with less weight gain.

To prevent long-term weight gain, focus on specific food swaps rather than just counting calories. Reduce daily servings of potato chips, french fries, sugar-sweetened beverages, and processed meats. Instead, increase your intake of yogurt, nuts, fruits, whole grains, and vegetables. These changes are independently associated with less weight gain, likely because they are more satiating and displace less healthy options.

Increases in physical activity are associated with less long-term weight gain, whereas absolute levels of physical activity are not associated with weight change.

To prevent long-term weight gain, focus on *increasing* your physical activity over time, not just maintaining your current level. The study found that absolute activity levels didn't predict weight change, but increases in activity were associated with less weight gain.

Maintaining a body-mass index (BMI) between 19 and 25 is associated with the lowest mortality rates and reduced risk of chronic diseases, whereas weight gain during adulthood significantly increases the risk of type 2 diabetes, hypertension, and coronary heart disease.

Aim to keep your BMI between 19 and 25. Do not accept gradual weight gain as 'normal' aging. If you gain 10 pounds after reaching adult height, intervene immediately with diet and activity changes to prevent long-term metabolic damage.

Caloric restriction, rather than macronutrient composition, is the primary determinant of weight loss; low-carbohydrate diets do not produce superior long-term weight loss compared to low-fat diets when caloric intake and lifestyle counseling intensity are matched.

To lose weight, focus on creating a caloric deficit through a reduced-calorie diet (1200-2000 kcal/day) and regular physical activity (150+ minutes/week). Do not rely on specific macronutrient ratios (like low-carb or low-fat) for superior results; instead, choose a dietary pattern you can adhere to long-term. Consistent behavioral support and self-monitoring are critical for success.

Sustained caloric restriction (approx. 12% reduction) in nonobese humans for 2 years is feasible and improves cardiometabolic risk factors (lipids, blood pressure, insulin sensitivity) and inflammatory markers (TNF-α, CRP) without adverse effects on quality of life.

For nonobese adults, reducing daily calorie intake by about 12% (roughly 250 calories) for two years is a safe and feasible strategy to significantly improve heart health markers (blood pressure, cholesterol, blood sugar) and reduce inflammation. This can be done without negatively impacting mood, hunger, or sexual function, provided the diet remains nutrient-dense.

Lifestyle intervention can prevent or delay the onset of type 2 diabetes for at least 10 years.

Lifestyle changes can prevent or delay type 2 diabetes for at least 10 years. Focus on losing 7% of your body weight and getting 150 minutes of moderate physical activity each week. Consistency is key, and structured support programs can help maintain these habits over the long term.

Maintaining a body mass index (BMI) of 23.0–24.9 or higher at age 21, or gaining 2.5 kg or more during adulthood, significantly increases the risk of major chronic diseases (type 2 diabetes, cardiovascular disease, and obesity-related cancers) in men.

For men, keeping a BMI below 23 at age 21 and avoiding adult weight gain are critical for preventing diabetes, heart disease, and certain cancers. Even 'modest' overweight or small weight gains (2.5+ kg) significantly increase risk, so maintaining a leaner early-adulthood weight is a high-leverage health strategy.

Weight loss of 10% or greater is associated with clinically significant improvements in asthma control (ACQ scores) in obese adults with uncontrolled asthma, whereas modest weight loss (<10%) is not.

For obese individuals with uncontrolled asthma, losing 10% or more of their body weight is likely to result in meaningful improvements in asthma control. Losing less than 10% may not provide enough benefit to change asthma symptoms, even if it helps other health markers. This suggests that asthma management in obesity may require more aggressive weight loss strategies than standard lifestyle advice.

Sustained weight loss of 5-10% or greater through negative energy balance interventions (behavioral, pharmacological, or surgical) prevents, reduces, or resolves obesity-related complications such as type 2 diabetes, hypertension, and fatty liver disease.

To significantly lower your risk of type 2 diabetes and other obesity-related diseases, you need to achieve and maintain a weight loss of at least 5-10% of your body weight. This can be done through lifestyle changes, medications, or surgery. The key is that the weight loss must be sustained over the long term, not just short-term dieting.

Greater magnitude of weight loss (e.g., >10-15%) is required to achieve remission of type 2 diabetes, whereas moderate weight loss (5-10%) is sufficient for prevention or delay.

If you want to prevent type 2 diabetes, losing 5-10% of your body weight is a great start. However, if you already have type 2 diabetes and want to achieve remission, you likely need to lose more than 10-15% of your body weight and keep it off.

Intensive lifestyle intervention (ILI) targeting weight loss and increased physical activity significantly improves glycemic control, promotes diabetes remission, and reduces microvascular complications (nephropathy and neuropathy) in adults with overweight/obesity and type 2 diabetes.

For adults with type 2 diabetes and obesity, committing to a structured lifestyle program that combines moderate calorie restriction (1200-1800 kcal) with regular moderate physical activity (175 mins/week) can significantly improve blood sugar control, reduce the risk of kidney and nerve damage, and even allow some to reverse their diabetes diagnosis, especially if started early in the disease course.

An intensive lifestyle intervention (ILS) focused on weight loss and increased physical activity reduces the incidence of type 2 diabetes by 58% compared to placebo in high-risk adults with prediabetes, with effects sustained over 21 years.

To significantly lower your risk of developing type 2 diabetes, focus on losing 7% of your body weight and getting at least 150 minutes of moderate physical activity per week. This lifestyle approach is proven to be more effective than medication (metformin) for preventing diabetes in high-risk individuals, with benefits lasting for decades.

Intensive lifestyle intervention leads to significant long-term weight loss and improvements in microvascular complications (diabetes remission, kidney disease, sleep apnea) in individuals with type 2 diabetes, despite failing to reduce macrovascular cardiovascular events.

Focus on the tangible benefits of weight loss for your diabetes management, such as better blood sugar control, reduced need for medication, and improved quality of life. These benefits are real and significant, even if weight loss doesn't directly prevent heart attacks.

Dietary patterns significantly shape the gut microbiome, with fiber-rich diets increasing diversity and beneficial bacteria, while high-fat diets decrease diversity and promote pro-inflammatory species.

Prioritize fiber-rich foods (vegetables, fruits, whole grains) to support microbial diversity and beneficial bacteria. Limit high-fat, processed foods which reduce diversity and promote inflammation.

Significant weight loss (typically >10%) induced by intensive lifestyle interventions (very low-calorie diets) or metabolic bariatric surgery can induce remission of type 2 diabetes (HbA1c < 6.5% without medication), primarily by reversing ectopic fat accumulation in the pancreas and liver.

If you have recently been diagnosed with Type 2 diabetes, prioritize significant weight loss immediately. Clinical trials show that losing a substantial amount of weight (often via structured, low-calorie diet programs) can put your blood sugar into remission (normal levels without medication), especially if you act within the first few years of diagnosis. This reverses the fat accumulation in your pancreas and liver that is driving the disease.

Intensive lifestyle intervention (≥150 min/week moderate exercise and 500-1000 kcal/day caloric deficit) significantly reduces the incidence of new-onset type 2 diabetes compared to placebo, with benefits persisting for at least 21 years.

To prevent type 2 diabetes, aim for 150 minutes of moderate exercise per week and eat 500-1000 calories less than you burn daily. This combination helps you lose 7% of your body weight. The benefits last for decades, reducing your risk of diabetes and related complications like heart disease and kidney issues. Start with small, sustainable changes to diet and activity.

Carbohydrate-restricted diets lead to significant reductions in body weight, body fat percentage, and visceral adipose tissue compared to higher-carbohydrate diets.

Cutting carbs to under 45% of your calories is an effective strategy for losing body fat and visceral fat. You will likely lose some weight and body fat percentage, especially if you are overweight. Be aware that you might lose some lean muscle mass along with the fat, so monitoring your strength and considering resistance training is advisable.

Bariatric surgery (Roux-en-Y gastric bypass and sleeve gastrectomy) is recommended for individuals with BMI > 35 kg/m² regardless of comorbidities, and for those with BMI 30-34.9 kg/m² and metabolic diseases.

Bariatric surgery is now recommended for individuals with a BMI over 35, even without other health issues, and for those with a BMI of 30-34.9 who have metabolic diseases. Procedures like Roux-en-Y gastric bypass and sleeve gastrectomy provide substantial long-term weight loss and improve quality of life.

Every 5 kg of weight loss from anti-obesity treatment reduces the risk of myocardial infarction, stroke, and heart failure.

Losing just 5 kg (about 11 lbs) through anti-obesity treatments can significantly lower your risk of heart attack, stroke, and heart failure. This highlights the importance of achieving even modest weight loss for long-term cardiovascular health. Work with your healthcare provider to find a safe and effective weight management strategy.

Weight loss of 7-10% is required to resolve steatohepatitis (MASH) and regress fibrosis, whereas 5% loss primarily improves steatosis.

To reverse liver inflammation, aim for a 7-10% total body weight loss through diet and exercise. Losing 5% helps reduce liver fat, but hitting the higher threshold is necessary to fix the actual liver damage (inflammation). Combine caloric restriction with both aerobic and resistance training to preserve muscle mass.

The physiological mechanism of diabetes remission via weight loss involves the reduction of ectopic fat in the liver and pancreas, which restores beta-cell function and insulin sensitivity.

N/A (Mechanistic explanation).

Bariatric surgery significantly reduces peripheral blood pressure and leads to hypertension remission in a majority of patients with morbid obesity, primarily through weight loss.

For individuals with morbid obesity and hypertension, bariatric surgery (such as gastric bypass) is a highly effective intervention that often leads to the remission of high blood pressure. It is superior to lifestyle changes and medication alone for achieving long-term weight loss and cardiovascular risk reduction in this population.

A combined intervention of calorie-reduced low-fat diet and moderate-intensity aerobic exercise produces significantly greater weight loss and body composition improvements than either intervention alone in overweight-to-obese postmenopausal women.

For postmenopausal women aiming for weight loss, combining a calorie-reduced, low-fat diet with moderate-intensity aerobic exercise is the most effective strategy. While exercise alone has limited impact on weight, adding it to a diet plan yields the greatest reduction in body weight and fat mass. Aim for 45 minutes of moderate exercise, 5 days a week, alongside a diet of 1,200-2,000 calories with less than 30% fat.

Aerobic exercise at moderate intensity (150-200 min/week) is the preferred intervention for weight and fat loss in adults with overweight or obesity, though expected weight loss is limited to 2-3 kg on average.

To lose weight, aim for 150-200 minutes of moderate-intensity aerobic exercise (like brisk walking) per week. Manage your expectations: you will likely lose 2-3 kg. This amount of exercise is highly effective for improving blood pressure and visceral fat, even if the scale doesn't move dramatically.