Browse the evidence

Low-carbohydrate diets induce greater early-phase calorie restriction (approx. 162 kcal/d) compared to low-fat diets, but this advantage is not sustained after 3 months.

If you start a low-carb diet, expect a stronger initial drop in hunger and calorie intake compared to a low-fat diet, but don't rely on this advantage for long-term weight management. The difference disappears after 3 months, so focus on finding a sustainable way to eat that you can maintain indefinitely, regardless of the macronutrient split.

Sustained weight loss (≥7% at 1 year) is associated with significantly lower HbA1c levels at 10 years compared to weight regain, although A1c may still rise slightly from baseline.

If you lose weight through lifestyle changes, keeping it off is crucial for long-term blood sugar control. Even if your blood sugar rises slightly from its lowest point, keeping 7% or more weight off keeps it significantly lower than if you regain the weight. This helps protect your kidneys over the next decade.

Homeostatic feedback control of energy intake increases by approximately 100 kcal/day for every kilogram of weight lost, acting as a proportional feedback system that significantly counteracts weight loss efforts.

When you lose weight, your body biologically pushes you to eat more—specifically, about 100 extra calories per day for every kilogram lost. This drive is stronger than your metabolic slowdown. To maintain weight loss, you must actively counteract this proportional increase in appetite, as it will naturally lead to weight regain if left unchecked.

Bariatric surgery reduces coronary artery disease (CAD) risk, whereas medical weight loss has not demonstrated a reduction in CAD rates.

If you have severe obesity, bariatric surgery is the only weight loss intervention proven to reduce heart disease risk. Medical weight loss programs have not shown this benefit. Discuss surgery with your doctor if you are a candidate.

Increased alcohol consumption (per drink per day) is associated with greater long-term weight gain.

Be aware that increased alcohol consumption is associated with weight gain. Moderating alcohol intake can help with long-term weight management.

Prolonged television watching is independently associated with a significantly increased risk of developing obesity and type 2 diabetes in women, even after adjusting for physical activity levels.

If you watch a lot of TV, be aware that it carries a specific health risk for obesity and diabetes that is not fully negated by your exercise routine. Try to limit TV time to under 10 hours per week and incorporate light activity like standing or walking around the house to mitigate these risks.

A lower resting energy expenditure (REE) is a significant risk factor for future body-weight gain in individuals who are not obese.

If you struggle with weight gain despite eating what seems like a normal amount, your resting metabolic rate might be lower than average. This isn't a failure of willpower; it's a biological risk factor. To manage this, you likely need to be more consistent with physical activity and mindful of portion sizes than someone with a higher metabolic rate, as your body burns fewer calories at rest.

Replacing sugar-sweetened beverages with noncaloric beverages reduces BMI and body weight in overweight and obese adolescents, but this effect is statistically significant only during the active 1-year intervention phase and disappears after one year of follow-up without intervention.

For overweight adolescents, replacing sugary drinks with water or diet drinks can help reduce weight gain, but only as long as the habit is actively supported. Once the support stops, the benefit disappears, suggesting that long-term success requires permanent behavioral change or environmental adjustments, not just a temporary fix.

High levels of physical activity (>= 60 minutes/day or >= 2000 kcal/week expenditure) are critical for the long-term maintenance of weight loss, whereas physical activity alone has limited benefit for inducing initial weight loss.

Use diet to lose the weight, but use high-volume exercise (>= 60 minutes/day of brisk walking or equivalent) to keep it off. If you struggle with time, break exercise into short 10-minute bouts throughout the day. Aim to increase your daily step count by 2000 steps initially, progressing to 6000-8000 extra steps after significant weight loss.

Exercise attenuates weight regain after weight loss by counteracting biological adaptations (reducing intake and elevating expenditure), but its effectiveness depends on adherence and individual responder status.

Exercise is a powerful tool to counter the biological drive to regain weight, but it requires consistency. If you struggle with adherence, focus on making exercise sustainable rather than intense. Be aware that you might eat more after exercising, so monitor your intake.

Waist circumference is a superior predictor of cardiometabolic risk compared to BMI alone, as it identifies individuals with high intra-abdominal fat even if their BMI is normal.

Measure your waist circumference in addition to your weight. A large waist (≥102 cm for men, ≥88 cm for women) indicates high risk for heart disease and diabetes, even if your BMI is in the 'normal' range. This metric helps identify 'normal weight obesity' where dangerous fat is stored around organs.

Adopting a traditional lifestyle characterized by high physical activity and low obesity levels prevents type 2 diabetes, even in populations with high genetic susceptibility.

If you have a family history of diabetes, your risk is not fixed. The most effective way to prevent the disease is to maintain a healthy weight and stay physically active. This is especially critical if you come from a background with high genetic risk for diabetes.

Bariatric surgery reduces long-term all-cause mortality and the incidence of type 2 diabetes in obese adults.

Bariatric surgery offers a significant long-term survival advantage for severely obese individuals, reducing the risk of death by nearly 30% over 16 years compared to non-surgical care. This benefit extends to a drastic reduction in the development of type 2 diabetes.

Loss of hip girth (>4.1 cm) is associated with a 1.5 times increased risk of diabetes, independent of weight change, likely due to loss of lean muscle mass.

For men, maintaining hip circumference (likely reflecting muscle mass) is important for diabetes prevention. Losing more than 4.1 cm in hip girth over 9 years increases diabetes risk by 50%, independent of total weight. Focus on preserving muscle mass through resistance training while managing abdominal fat.

SGLT2 inhibitor-induced glycosuria triggers a compensatory increase in energy intake (hyperphagia) that partially offsets the expected weight loss, resulting in net weight loss significantly lower than predicted by urinary glucose excretion alone.

If you take an SGLT2 inhibitor like empagliflozin, your body will naturally try to regain the calories lost in urine by making you eat more. This biological compensation significantly reduces the amount of weight you will lose compared to what the drug's mechanism suggests. To achieve significant weight loss, you cannot rely on the drug alone; you must actively implement caloric restriction to overcome this increased appetite.

Excluding physiologically implausible energy intake reports (where reported intake is <78% or >122% of predicted energy requirement) from dietary datasets reveals strong, biologically plausible positive associations between energy intake and BMI, whereas including these reports yields weak or spurious associations.

If you are analyzing diet and weight data, do not trust raw self-reported intake numbers. They are often inaccurate, especially for heavier individuals. You must filter out reports that are physiologically impossible (e.g., claiming to eat very little while having a high metabolic need) to see the true relationship between what people eat and their body weight. Without this filter, you might incorrectly conclude that obese people eat less than thin people.

Intensive lifestyle interventions resulting in significant weight loss (approx. 8.6% at 1 year) improve glycaemic control, reduce cardiovascular risk factors, and induce remission of type 2 diabetes, although they have not been shown to reduce the rate of major cardiovascular events compared to standard care.

Focus on losing 7% of your body weight through diet and 150 minutes of moderate exercise weekly. This will significantly improve your blood sugar control and quality of life. While this may not statistically reduce heart attack rates in large groups, it is the most effective first-line treatment for managing Type 2 Diabetes.

Obesity (BMI >= 30) is significantly associated with low leisure-time physical activity in women, but this association was not observed in men in this specific population.

For women, increasing leisure-time physical activity is a key strategy to prevent obesity. For men in this population, leisure-time physical activity was not significantly associated with obesity, suggesting that dietary factors or other lifestyle elements may be more critical targets for weight management.

Increased mitochondrial reactive oxygen species (ROS) production and oxidative damage contribute to age-related mitochondrial dysfunction and muscle loss, but this can be mitigated by upregulating antioxidant defenses through exercise and caloric restriction.

Oxidative stress damages mitochondria and contributes to muscle loss. Instead of relying solely on antioxidant supplements, focus on lifestyle strategies like exercise and caloric restriction. These approaches upregulate your body's natural antioxidant defenses, improving mitochondrial function and reducing oxidative damage.

The absolute risk reduction from high-quality diets is significantly greater in individuals with a high BMI (overweight or obese) compared to those with normal weight.

If you are overweight or obese, improving your diet quality offers the greatest absolute protection against developing type 2 diabetes. Focus on whole grains, plants, and limiting processed meats and sugars to maximize this benefit.

A wearable shoe-based sensor combining heel acceleration and plantar pressure can accurately classify six common postures and activities (sitting, standing, walking/jogging, ascending/descending stairs, cycling) with >95% accuracy using a group model, enabling precise energy expenditure estimation for obesity management.

To better manage your weight, you need to know exactly how much energy you burn. This research shows that a smart shoe sensor can accurately track your daily activities—like walking, standing, and cycling—with high precision. By using this technology, you can get a clear picture of your energy expenditure, which is crucial for making informed lifestyle changes to prevent or treat obesity.

Calorie restriction induces metabolic adaptation in resting metabolic rate (RMR) that persists beyond expected losses in fat-free mass, effectively defending body weight.

If you are restricting calories, expect your resting metabolism to drop more than just the calories burned by carrying less weight. This adaptation defends your current weight. To maintain weight loss, you must either strictly control food intake to match this new, lower metabolic rate or increase energy expenditure through exercise to offset the drop.

Spontaneous Physical Activity (SPA) measured in a respiratory chamber does not significantly decrease in response to calorie restriction in non-obese individuals, whereas free-living Physical Activity Level (PAL) decreases.

When you diet, your body reduces your free-living activity (PAL), such as fidgeting or general movement, even if your structured exercise remains constant. This unconscious reduction contributes to weight loss resistance. To counteract this, you may need to incorporate structured exercise to maintain total energy expenditure.

Intensive lifestyle interventions that reduce nutrient load (weight loss) improve cardiovascular outcomes in obese type 2 diabetes patients, whereas intensive insulin therapy in similar patients increases mortality.

For obese diabetics, losing weight through diet and exercise is a powerful way to protect your heart. Unlike high-dose insulin, which can increase mortality in this group, weight loss reduces the burden on your body without causing metabolic stress.