Browse the evidence

A multidisciplinary outpatient obesity treatment program utilizing a very-low-energy diet (VLED) followed by long-term maintenance and pharmacotherapy achieves clinically significant weight loss (mean 3.5% at 3 years) and improves retention rates compared to lifestyle methods alone.

For severe obesity, relying on willpower and standard dieting often leads to weight regain. A structured medical approach using a very-low-energy diet (around 550-800 calories) for initial loss, followed by regular check-ins and potentially appetite-suppressing medication, can help maintain a clinically meaningful weight loss (around 3.5%) over three years. This approach addresses the physiological drive to regain weight.

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.

Ketogenic Enteral Nutrition (KEN) using 24-hour continuous nasogastric infusion of 50-65g protein induces rapid weight loss (approx. 10% body weight in 10 days) with 57% of the loss derived from fat mass.

This protocol involves a medical procedure (nasogastric tube) delivering a specific protein-only formula 24/7 for 10 days. It is not a standard diet but a clinical intervention. It results in rapid fat loss while sparing muscle, but requires medical supervision, equipment, and tolerance for a nasal tube. It is not suitable for long-term maintenance without medical oversight.

An 18-month multidisciplinary commercial obesity treatment program combining cognitive behavioral therapy, nutritional advice, and physical activity results in significant weight loss (-10.9 kg), improved cardiometabolic risk factors, and better quality of life in severely obese individuals.

If you are severely obese, a structured 18-month program that combines diet, exercise, and psychological counseling (specifically CBT) can lead to significant weight loss (around 11 kg on average for completers) and improvements in blood pressure, blood sugar, and quality of life. The key is consistency; the program uses financial commitment and flexible scheduling to help maintain adherence. While it requires significant time and potentially money, the health benefits for cardiometabolic risk factors are substantial.

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.

A 5:2 intermittent fasting protocol (500-600 kcal on 2 non-consecutive days, ad libitum meal replacement on 5 days) for 3 weeks significantly reduces body weight, BMI, and atherosclerosis index in adults with BMI 18-30, regardless of baseline microbiota composition.

Try a 5:2 fasting schedule for three weeks. On two non-consecutive days, eat only 500-600 calories (using meal replacements if helpful). On the other five days, eat your normal dinner using a meal replacement powder, but otherwise eat normally. This approach led to an average loss of 3.67 kg and improved heart health markers in the study, regardless of your starting weight.

Combining a low-calorie diet (960 kcal) with daily dumbbell exercise (20 min, 2kg) for 12 weeks reduces body fat and waist-to-hip ratio more effectively than low-calorie diet alone in mildly obese young women, while preserving fat-free mass.

For young women looking to lose fat, combining a strict low-calorie diet (around 960 kcal) with daily, short (20 min) dumbbell workouts (2kg) may help reduce body fat and waist size more than dieting alone, without losing muscle. The key is consistency and simplicity.

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.

A 12-month digital weight management program integrating tirzepatide with behavioral coaching achieves clinically meaningful weight loss (mean 22.7%) and significant improvements in binge eating and depressive symptoms.

If you have obesity and are considering medication, a structured program that combines tirzepatide with digital coaching and support can lead to significant weight loss (over 22% on average) and improvements in mental health and binge eating. Expect some initial side effects like nausea, but these often subside, and clinical support is available to help you manage them.

A 12-week high-protein intermittent-fasting low-calorie (HP-IF-LC) diet significantly improves body composition, lipid profiles, and arterial function in obese adults compared to baseline.

If you are obese, a 12-week program combining high protein intake, intermittent fasting, and a calorie deficit can significantly lower your BMI, waist size, and improve your heart health markers like blood pressure and cholesterol. This approach may be superior to standard 'heart-healthy' diets for maintaining weight loss long-term.

Combining progressive resistance training with adequate dietary protein (1.2-1.5 g/kg/day) and Vitamin D is the primary evidence-based management strategy for sarcopenia in older adults.

For older adults at risk of muscle loss, the most effective strategy is not a single pill or diet, but a combination of supervised resistance exercise (for at least 3 months), ensuring protein intake of 1.2-1.5 grams per kilogram of body weight daily, and correcting Vitamin D deficiency. This multi-pronged approach is currently the best way to maintain muscle function and prevent disability.

Adequate nutrition, specifically sufficient energy and protein intake, is a necessary first step in the management of sarcopenia and clinical frailty.

Before or alongside exercise, ensure you are eating enough energy and protein. This is the first step in managing sarcopenia.

Extending nocturnal sleep to 10 hours per night for 5-7 weeks significantly improves specific athletic performance metrics, including sprint speed and shooting accuracy, in collegiate basketball players.

If you are an athlete, try adding 1-2 hours of sleep to your night for at least 5 weeks. Aim for 10 hours in bed. You should see faster sprint times and better shooting accuracy. This is not about sleeping in lazily; it is about giving your body the recovery time it needs to perform at its peak.

A structured very-low-calorie ketogenic diet (VLCKD) administered for 17-19 weeks effectively reverses insufficient weight loss and weight regain in post-bariatric surgery patients, achieving significant fat mass reduction while preserving muscular strength and metabolic health.

If you have had bariatric surgery but haven't lost enough weight or have regained it, a structured Very-Low-Calorie Ketogenic Diet (VLCKD) is a viable, safe, and effective option. The protocol involves a strict 6-week active phase (approx. 600 kcal, very low carb, high protein), followed by a gradual re-introduction of foods over 13 more weeks. Crucially, you must continue your prescribed post-surgical vitamin and mineral supplements to avoid deficiencies. This approach can help you lose significant fat while keeping your muscle strength, without harming your liver or kidneys, provided you are not diabetic or have other severe comorbidities.

High-Intensity Intermittent Exercise (HIIE) produces greater reductions in subcutaneous and abdominal fat compared to steady-state aerobic exercise when exercise volume is equated, particularly in overweight or obese populations.

If you are overweight or have metabolic issues, try High-Intensity Intermittent Exercise (HIIE) on a stationary bike. Perform 3-4 sessions per week. Use a protocol like 30 seconds of all-out sprinting followed by 4 minutes of rest, repeated 4-6 times. This takes only about 3-4 minutes per session. While it is uncomfortable, it has been shown to reduce abdominal and subcutaneous fat more effectively than longer, moderate-intensity steady-state cardio, especially in those with higher body fat.

Postmenopausal women should adopt a healthy dietary pattern (high in sea fish, seaweeds, dairy, cereals, vegetables, and fruits; low in fast food, animal fat, sweets, and fried food) to protect against dysregulated lipid metabolism, metabolic syndrome, and obesity.

Focus on a diet rich in whole foods: eat more sea fish, seaweeds, dairy, cereals, fresh vegetables, and fruits. Simultaneously, reduce your intake of fast foods, animal fats, sweets, and fried foods. This pattern helps lower triglycerides, raise HDL cholesterol, and reduces the risk of metabolic syndrome common after menopause.

Integrated periodization, which coordinates exercise training with recovery, nutrition, psychology, and skill acquisition across training phases, optimizes athletic performance more effectively than exercise-only periodization.

Do not just plan your workouts. Plan your sleep, your food timing, your mental focus, and your technical practice in sync with your physical training phases. Adjust these non-training factors to support the specific goals of each training block (e.g., high volume vs. taper).

Adopting a Mediterranean-style Step I diet (high in alpha-linolenic acid, fruits, vegetables, and fish) significantly reduces the risk of recurrent cardiovascular disease events compared to a standard Step I diet in post-myocardial infarction patients.

If you have had a heart attack, switch to a Mediterranean-style diet. Eat more bread, root/green vegetables, fish, and fruit daily. Replace red meat with poultry. Use margarine high in alpha-linolenic acid (like canola/vegetable oil blends) instead of butter/cream. This specific pattern has been shown to cut recurrent heart event risk by half to seventy percent compared to standard low-fat diets, even when cholesterol levels look similar.

Regular physical activity, particularly strength training, improves physical functioning and quality of life in older adults by preserving muscle mass and strength, thereby supporting independent living.

Engage in regular physical activity, specifically including strength training, to maintain muscle mass and strength. This helps you perform daily tasks independently and improves your overall quality of life.

High-velocity power training improves whole-body physical function in community-dwelling older adults more effectively than traditional strength training, despite producing similar gains in maximal strength and anaerobic power.

If you are an older adult looking to improve your ability to perform daily tasks like climbing stairs or getting out of a chair, prioritize speed over heavy weight. Perform your resistance exercises (like leg presses or chest presses) at 40% of your maximum strength, but move the weight as fast as you safely can. Do this three times a week for at least 16 weeks. You do not need to lift heavy weights to see functional improvements; the speed of the movement is the key driver.

Lifestyle interventions involving weight management through diet and physical activity are the primary effective strategy for improving liver histology and delaying disease progression in NAFLD, whereas pharmacological treatments like metformin lack demonstrated effectiveness and TZDs carry significant long-term risks.

Focus on weight management through diet and physical activity. This is the only proven method to improve liver histology and delay NAFLD progression. Do not rely on metformin for liver health, as studies show it is ineffective for this purpose. Be aware that while TZDs (like pioglitazone) can reduce liver fat, they carry significant side effects (heart failure, osteoporosis) and NASH can recur if stopped.

Consuming wholegrains is associated with reduced risks of coronary heart disease, type 2 diabetes, and all-cause mortality compared to refined carbohydrates.

Replace refined grains (white bread, white rice, regular pasta) with wholegrain versions (wholewheat bread, brown rice, wholegrain pasta) in your regular meals. This simple swap provides fiber and resistant starch that help lower cholesterol and stabilize blood sugar, reducing your risk of heart disease and diabetes.

Tailored, supervised exercise training serves as an effective multisystemic therapy for post-COVID-19 syndrome, mitigating symptoms such as fatigue, dyspnea, and neurocognitive impairment.

If you have persistent symptoms after COVID-19, do not avoid exercise, but do not push through fatigue. Start with low-load, low-volume resistance training and interval-based endurance training that does not take you to failure. The goal is to gradually improve functional capacity and reduce symptoms like breathlessness and brain fog. Consult a specialist to create a tailored plan that respects your current limits and allows for adequate recovery.