Browse the evidence

Low-intensity endurance training targeted at maximal lipid oxidation (LIPOXmax) maintains significant weight loss over 3 years, whereas low-fat diet alone fails to sustain weight loss after 1 year.

To lose weight and keep it off long-term, try low-intensity endurance exercise (like cycling or walking) where you can still hold a conversation but are working hard enough to burn fat. Aim for about 45 minutes, 3 times a week. Don't worry about burning massive calories; the key is training your body to use fat efficiently and potentially reducing your appetite. Consistency and regular check-ins with a professional are crucial for maintaining these habits over years.

A remote digital health intervention combining mobile applications, wireless scales, and low-calorie meal replacement biscuits produces clinically significant weight loss (mean 14 kg, 13% total body weight loss) in severely obese individuals (BMI ≥35 kg/m2) over 120 days.

If you have severe obesity (BMI ≥35), a structured digital program using meal replacement biscuits and daily self-weighing can lead to significant weight loss (around 13% of body weight over 4 months). The key is consistency: weigh yourself daily using a connected scale and follow the prescribed meal plan. This approach is designed to be accessible and scalable, offering a viable alternative to more invasive or expensive treatments for those who can adhere to the protocol.

A 28-day low-calorie diet (800–1100 kcal/day) induces a linear reduction in hepatic fat content and rapid, time-dependent improvements in hepatic insulin sensitivity and lipid metabolism in obese women.

For obese women, a strict 28-day low-calorie diet (800-1100 kcal) significantly reduces liver fat by over 50% and rapidly improves insulin sensitivity within the first week. While metabolic markers like ketones and liver enzymes (ALT) may rise temporarily due to increased fat burning, this is part of the adaptive process. The key is sustained caloric restriction, which yields linear liver fat loss and metabolic health gains.

Engagement with a digital weight management platform (coaching, app use, weight tracking) significantly enhances weight loss outcomes in individuals using GLP-1 or GLP-1/GIP receptor agonists compared to pharmacotherapy alone.

If you are using GLP-1 or GLP-1/GIP medications for weight loss, actively engaging with your digital health platform (attending coaching, using the app, tracking weight) leads to significantly better results than just taking the medication. Aim to participate in coaching sessions, log your weight regularly, and use the app's educational features to maximize your weight loss.

Personalized Nutrition Therapy (PNT) combined with Continuous Glucose Monitoring (CGM) produces significant weight loss and fat mass reduction in overweight/obese individuals with prediabetes, even without explicit weight loss counseling or caloric restriction mandates.

If you have prediabetes and are overweight, try using a Continuous Glucose Monitor (CGM) not just for data, but as a feedback tool. Work with a nutritionist to personalize your diet based on your glucose responses to specific foods, rather than following a generic 'low calorie' or 'low carb' diet. Focus on keeping glucose under 140 mg/dL after meals. This approach can lead to significant weight loss and fat reduction without the stress of strict calorie counting or feeling deprived.

Supplementing with 20g/day of medium-chain triglycerides (MCTs) starting 5 days before a very low-calorie ketogenic diet (VLCKD) significantly enhances weight loss, fat mass reduction, and BMI class improvement compared to VLCKD alone.

If you are starting a strict ketogenic diet, consider taking 20g of MCT oil daily starting 5 days before you begin the diet. This may help you enter ketosis faster and lose more weight and fat than starting the diet without it. Ensure you are following a very low-calorie plan.

Intensive diet-induced weight loss (approx. 13.4% body weight over 12 weeks) leads to rapid and complete resolution of hepatic steatosis in NAFLD patients, with 90% achieving complete resolution as measured by MRI.

For NAFLD patients, a 12-week intensive meal replacement program (approx. 1100 kcal/day) can completely resolve liver fat in 90% of cases. This rapid resolution is achievable even with Class II obesity, suggesting that short-term intensive intervention is a viable and effective primary treatment strategy.

Time-restricted eating (TRE) without calorie restriction significantly reduces body weight, BMI, and whole-body fat mass in adults.

Adopt a 16:8 eating window (e.g., 12pm-8pm) for daily food intake. Do not restrict calories intentionally; simply stop eating after your chosen window. Expect modest weight loss (~1.6kg) and fat reduction over time, especially if you have metabolic risk factors.

Preoperative dietitian-led Very Low Calorie Diet (VLCD) of 800-1000 kcal/day for 2-12 weeks significantly reduces weight and waist circumference in obese adults undergoing elective surgery without causing unfavorable lean body mass loss.

If you are scheduled for elective surgery and have obesity, ask your surgeon or care team about a preoperative dietitian-led Very Low Calorie Diet (VLCD). This involves consuming 800-1000 calories daily, primarily through meal replacements, for 2-12 weeks before your operation. Crucially, a dietitian must monitor your protein intake to ensure you do not lose muscle mass, which can complicate surgery and recovery. This approach has been shown to significantly reduce weight and waist circumference, potentially making the surgery technically easier and reducing complications.

A 16-week Tabata training program significantly reduces body fat percentage, fat mass, BMI, and waist circumference in healthy inactive women.

If you are a healthy woman with a sedentary job, performing Tabata-style high-intensity intervals (20 seconds hard work, 10 seconds rest) for about 20 minutes, 4 times a week, for 4 months, can significantly reduce your body fat and waist size without needing to change your diet drastically.

A multimodal metabolic health intervention emphasizing therapeutic carbohydrate reduction (TCR) and intermittent fasting, supported by remote monitoring and coaching, produces robust 1-year weight loss (mean 15.5%) and significant medication deprescription in patients with obesity and type 2 diabetes.

If you have obesity or type 2 diabetes, consider a structured program that combines a low-carbohydrate diet (under 30g carbs/day) with remote health monitoring and coaching. This approach can lead to significant weight loss (around 15%) and may allow you to reduce or stop diabetes and blood pressure medications under medical supervision, potentially saving money and avoiding medication side effects.

High-Intensity Interval Training (HIIT) is more effective for fat loss and muscle retention in younger obese adults (18-30 years), whereas Moderate-Intensity Continuous Training (MICT) is preferred for middle-aged (31-40) and older (41-60) adults due to better adherence and sustainability.

If you are under 30 and obese, HIIT may offer faster fat loss and muscle retention. If you are over 30, prioritize Moderate-Intensity Continuous Training (MICT) like brisk walking or cycling, as it is equally effective for fat loss but easier to stick with and safer for joints.

HIIT is more time-efficient than MICT for achieving similar fat loss outcomes, primarily due to excess post-exercise oxygen consumption (EPOC) and appetite regulation.

If you are short on time, HIIT can provide similar fat loss benefits to longer cardio sessions in less time, thanks to increased calorie burn after exercise.

Very Low Calorie Diet (VLCD) is a highly effective intervention for weight loss, ranking highest in its network.

A Very Low Calorie Diet (VLCD) produces significant weight loss (approx. 4.5 kg more than maintenance) compared to eucaloric diets. It was the top-ranked treatment in its network, suggesting high efficacy for rapid weight reduction under medical supervision.

Combining calorie restriction with exercise (Hyc+Ex) is more effective than exercise alone.

Combining calorie restriction with exercise is more effective for weight loss than exercise alone. This combination was the top-ranked treatment in its network, producing a mean weight loss of 4.45 kg.

A structured exercise program combined with nutritional education significantly increases physical activity levels, energy expenditure, and reduces anthropometric obesity markers (weight, BMI, waist circumference) in obese sedentary workers.

If you have a sedentary job, combine 3 hours of moderate-to-high intensity structured exercise per week (like jogging, gym, or sports) with a diet low in calories but high in fiber and vitamins. Additionally, increase your daily spontaneous movement by taking stairs and walking more. This combined approach significantly reduces weight and waist circumference in obese workers.

Combining aerobic exercise with fasting protocols produces greater weight loss, fat reduction, and metabolic improvements in obese women than either intervention alone.

For obese women seeking effective weight loss, combining regular aerobic exercise (like walking, cycling, or swimming) with a fasting protocol (such as intermittent fasting or time-restricted feeding) is more effective than doing either alone. This approach leads to greater fat loss, improved insulin sensitivity, and better lipid profiles. Start with a manageable fasting window and a consistent exercise routine, and monitor your progress. This strategy is supported by robust mechanistic insights and practical benefits, making it a valuable addition to comprehensive obesity management programs.

Intermittent fasting (5:2 diet) produces significantly greater weight loss and improvements in insulin resistance compared to continuous calorie restriction in overweight women over 12 weeks.

If you are overweight and non-diabetic, try a 5:2 intermittent fasting schedule for 12 weeks. On two non-consecutive days, eat only 20-25% of your daily energy needs. On the other five days, eat normally. This approach may lead to greater weight loss and better insulin sensitivity than simply cutting calories every day.

A structured 12-week calorie-restricted dietary intervention starting with a 6-week Very Low-Calorie Diet (VLCD) phase (800-1200 kcal/day) followed by a 6-week maintenance phase significantly reduces body weight and improves postprandial glycemic response in Korean adults with early type 2 diabetes and obesity.

For Korean adults with early type 2 diabetes and obesity, a structured 12-week program starting with a 6-week very low-calorie diet (800-1200 kcal/day, with meals provided) followed by a 6-week self-managed maintenance phase can lead to significant weight loss (approx. 7-8%) and improved blood sugar control. The key is the structured, phased approach and meal provision to ensure adherence.

Short-term provision of Healthy Ketogenic Diet Ready-To-Eat (HKD-RTE) meals enhances initial weight loss and adherence compared to HKD counseling alone, leading to sustained greater weight reduction at 6 months despite the RTE intervention ending after one month.

If you struggle with the time and effort of preparing a ketogenic diet, try using ready-to-eat meals that fit your macros for the first month. This study suggests that this short-term convenience can help you establish better habits and lose more weight in the long run (6 months) compared to just getting advice. Focus on getting the first month right with convenient, pre-made meals to build momentum.

Adherence to Healthy Ketogenic Diet Ready-To-Eat (HKD-RTE) meals is positively associated with greater weight loss, with each 1% increase in compliance linked to additional weight loss over 3 months.

Your weight loss is directly tied to how consistently you follow the meal plan. Even small improvements in your compliance (like eating your pre-made meals more often) can lead to extra weight loss. Don't aim for perfection; aim for consistency, as every bit of compliance counts.

Nutritional guidance that dynamically adjusts energy intake based on regular measurements of Resting Energy Expenditure (REE) and physical activity effectively reduces body weight in patients with obesity without triggering metabolic adaptation (REE reduction) or increasing hunger.

To lose weight without triggering your body's survival mechanisms (slowed metabolism and intense hunger), you must tailor your calorie intake to your specific energy burn. This involves measuring your Resting Energy Expenditure (REE) and tracking physical activity, then adjusting your daily calorie target regularly (e.g., weekly) as your body changes. Use technology like meal-tracking apps to ensure you are hitting these dynamic targets. This personalized approach allows for significant weight loss (approx. 5% in 24 weeks) while keeping your metabolism and hunger levels stable.

Combining High-Intensity Interval Training (HIIT) with Resistance Training (RT) increases lean muscle mass and reduces visceral fat more effectively than Moderate-Intensity Continuous Training (MICT) alone in postmenopausal women.

If you are a postmenopausal woman looking to lose visceral fat and build muscle, combine short, intense cardio intervals with resistance training 3 times a week instead of just doing steady-state cardio.

Both 5:2 and 16:8 intermittent fasting protocols produce statistically significant weight loss in overweight and obese individuals over a 6-week period, with no statistically significant difference in efficacy between the two methods.

If you are overweight or obese, you can choose either the 5:2 method (eating very little on 2 days a week) or the 16:8 method (eating within an 8-hour window daily) to lose weight. Both work significantly over 6 weeks, and neither is proven to be better than the other. Pick the one you can stick with consistently.