Browse the evidence

Lifestyle modification programs combining dietary recommendations, physical activity, and cognitive-behavioral therapy produce significant weight loss (8-10% of initial weight) and improve metabolic health, but long-term maintenance is difficult without continuous care.

To lose and maintain weight, you need a structured plan that includes a moderate caloric deficit (500-1000 kcal/day), regular physical activity (aim for 10,000+ steps), and cognitive-behavioral strategies like self-monitoring and goal setting. Focus on building a 'personal formulation' of your specific triggers (emotional, social, environmental) rather than relying on willpower. Expect to regain some weight without continuous support, so plan for long-term maintenance strategies like weekly self-weighing and flexible dietary adherence.

Self-efficacy and intrinsic motivation are critical predictors of successful weight loss and maintenance, often more so than specific diet macronutrient composition.

Focus on building your belief in your ability to succeed (self-efficacy) and finding intrinsic enjoyment in healthy habits. Use strategies like observing others who succeed, experiencing small benefits, and receiving positive feedback. This psychological foundation is more critical for long-term success than perfecting your diet's macronutrient ratio.

An 8-week low-carbohydrate diet combined with prescribed aerobic and resistance exercise significantly improves cardiorespiratory fitness (VO2peak) and reduces fat mass index more effectively than exercise with standard dietary advice in obese individuals.

If you are obese, combining a low-carb diet (under 50g carbs/day) with a structured exercise program (mix of cardio and weights, 4x/week) for 8 weeks will likely improve your heart health and reduce body fat more than just exercising with standard dietary advice. Be aware that you might lose some muscle mass, but the exercise helps mitigate this.

Lifestyle therapy, specifically smoking cessation, is the single most important component of lifestyle management for patients with cardiorenal and metabolic diseases.

Stop smoking. It is the single most impactful lifestyle change you can make for your heart, kidneys, and metabolic health. Ask your doctor for support to help you quit.

Adequate sleep (7-9 hours nightly) is a critical lifestyle factor that decreases risks of insulin resistance, hypertension, hyperglycemia, dyslipidemia, and inflammation.

Prioritize getting 7-9 hours of sleep each night. Poor sleep directly worsens your blood sugar, blood pressure, and inflammation.

Incorporating specific behavior change techniques—specifically prompt focus on past success, barrier identification/problem-solving, use of follow-up prompts, and providing information on where/when to perform activity—significantly increases physical activity levels in adults with Type 2 diabetes.

To increase physical activity, do not just tell patients to exercise. Instead, use four specific strategies: 1) Remind them of past successes to build confidence. 2) Identify and solve specific barriers they face (e.g., joint pain, time). 3) Use follow-up prompts like reminders. 4) Give explicit information on where and when to exercise (specific locations and times).

Using behavior change techniques of 'prompt review of behavioural goals' and 'provide information on where and when to perform physical activity' is associated with improved HbA1c levels in adults with Type 2 diabetes.

To improve HbA1c, focus on reviewing the patient's specific physical activity goals and providing clear information on where and when to exercise. These two strategies were significantly associated with improved glycemic control.

High sodium intake, low whole grain intake, and low fruit intake are the three largest contributors to diet-related deaths and disability-adjusted life years globally.

Prioritize reducing sodium, increasing whole grains, and increasing fruit intake as the top three dietary changes for global health impact. Be mindful of regional dietary patterns, such as high refined carbohydrate intake in Asian diets, when making these swaps.

Supplementation with 500 mg/day of Sensoril (aqueous ashwagandha extract) for 12 weeks significantly increases maximal strength (1-RM squat and bench press) and aerobic endurance (7.5 km cycling time trial) in recreationally active men undergoing resistance training compared to placebo.

If you are a man who lifts weights recreationally, taking 500 mg of Sensoril (a specific ashwagandha extract) daily for 12 weeks, alongside your normal 4-day/week resistance training, can help you gain more strength and improve your aerobic endurance than training alone. Ensure you are healthy, normotensive, and not taking other ergogenic supplements before starting.

Comprehensive lifestyle management, including reduced calorie diets, increased physical activity, and behavioral intervention, is the foundational cornerstone of all obesity treatment and is appropriate for all individuals who may benefit from intervention.

Start with a caloric deficit of 500-750 kcal per day and aim for at least 150 minutes of aerobic activity weekly. To succeed, you need more than just willpower; engage with a structured program or a trained interventionist for at least 14 sessions over six months to achieve a 5-10% weight loss. Maintain this with monthly check-ins.

Weight reduction in individuals with obesity and obstructive sleep apnea (OSA) significantly reduces the Apnea-Hypopnea Index (AHI), with a 20% BMI reduction associated with a 57% AHI reduction, though the incremental benefit diminishes beyond this threshold.

If you have OSA and are overweight, losing weight is one of the most effective treatments available. Losing 20% of your body weight can reduce your sleep apnea severity by more than half. However, be aware that the biggest improvements happen in the first stages of weight loss; losing even more weight still helps, but the gains become smaller. Don't let the diminishing returns stop you—every bit of weight loss contributes to better sleep health.

Higher levels of physical activity at baseline are associated with greater use of specific dietary weight loss maintenance strategies, including lower fat intake, higher cognitive restraint, and more frequent use of behavioral tools like weighing oneself and keeping written food records.

If you exercise heavily, you may naturally or intentionally adopt stricter dietary habits like lower fat intake and higher cognitive restraint. If you exercise less, you might not need to be as strict with your diet to maintain weight, though you must still manage intake. Identify which lever (activity or diet) you prefer to pull.

Detrimental changes in physical activity (decrease) and energy intake (increase) over time are predictive of greater weight regain, whereas improvements in both are associated with the least weight regain.

Consistency and improvement matter more than your starting point. If you reduce your activity or increase your food intake over time, you are likely to regain weight. Conversely, increasing activity and decreasing intake leads to the best maintenance outcomes. Monitor your trends, not just your baseline.

Replacing saturated fatty acids (SFA) with polyunsaturated fatty acids (PUFA), particularly plant-based ePUFAs, is associated with less long-term weight gain and reduced risk of obesity in prospective cohort studies.

To prevent age-related weight gain, replace saturated fats (found in animal products) with polyunsaturated fats (found in plant oils, nuts, seeds). This substitution is associated with less long-term weight gain compared to diets high in saturated fats or trans fats.

Progressing resistance training by increasing repetitions while keeping load constant produces similar muscle hypertrophy and strength gains as progressing by increasing load while keeping repetitions constant over an 8-week period.

You do not need to add weight to the bar every week to keep building muscle. If you are stuck at a certain weight, focus on doing more repetitions with that same weight. As long as you are pushing close to failure, increasing your reps is just as effective for building muscle and strength as increasing the weight itself. This gives you a flexible way to progress, especially when you hit a plateau with adding weight.

Performing three sessions of high-intensity interval exercise (HIIE) during a five-night period of sleep restriction (4 hours time in bed) mitigates the detrimental effects of sleep loss on glucose tolerance, mitochondrial respiratory function, and sarcoplasmic protein synthesis.

If you are going through a period of poor sleep (e.g., new parent, shift work, stress), do not skip exercise. Instead, perform short, high-intensity interval sessions (like 10x 60s sprints on a bike) 3 times during the week. This specific type of exercise appears to protect your body's ability to handle sugar and maintain muscle energy production, counteracting the negative effects of losing sleep.

Creatine supplementation combined with resistance training produces a small but statistically significant increase in regional skeletal muscle hypertrophy (measured by direct imaging like MRI/ultrasound) compared to resistance training alone.

If you are lifting weights, adding creatine (3-5g daily or 0.1g/kg) will likely help you build a small amount of extra muscle compared to lifting alone. The effect is small, not massive, but it is real and supported by direct imaging studies. It works for both young and older adults, though the benefit may be slightly larger in younger individuals.

In adults with type 2 diabetes, a 10% reduction in fat mass (FM) over one year is significantly associated with a lower risk of incident heart failure (HF), whereas changes in lean mass (LM) are not significantly associated with HF risk.

If you have type 2 diabetes, losing fat mass is a powerful way to lower your risk of heart failure. This study shows that a 10% drop in fat mass significantly reduces risk, while losing muscle mass does not have the same protective effect. Focus your lifestyle efforts on reducing fat through diet and activity, rather than worrying excessively about losing muscle during weight loss.

Time-restricted feeding (16:8) and macronutrient-based diets (MBD) produce equivalent reductions in body weight, fat mass, and waist circumference in physically active, overweight individuals, provided adherence exceeds 70%.

You can lose fat using either a 16:8 fasting window or by tracking macros/calories, as long as you maintain a caloric deficit. The key is adherence: you must follow the plan more than 70% of the time. If you struggle with counting macros, try 16:8. If you struggle with fasting windows, track macros. Both require consistency to see changes in weight and waist size.

Individuals with elevated fasting plasma glucose (prediabetes or diabetes) achieve significantly greater weight loss on low-carbohydrate or high-fiber/low-glycemic-load diets compared to those with normal fasting plasma glucose, who show minimal differential response to these dietary compositions.

If you are overweight and have high fasting blood sugar (prediabetes or diabetes), you are likely to lose more weight by choosing a diet lower in carbohydrates or higher in fiber/low glycemic load. If your blood sugar is normal, the specific type of healthy diet matters less for weight loss magnitude, and adherence is the primary driver.

Physique athletes should consume 1.8-2.7 g/kg/day of protein (up to 3.5 g/kg for hunger mitigation) to preserve lean mass and manage satiety during caloric deficits.

Aim for 1.8 to 2.7 grams of protein per kilogram of body weight daily. If you are struggling with hunger during your diet, you can safely increase this to 3.5 g/kg, provided you still eat enough carbohydrates and fats to train effectively. Spread this protein across 4-5 meals, ensuring one is near your workout and one before sleep.

Adherence to a Mediterranean diet reduces cardiometabolic risk by improving lipid profiles, lowering blood pressure, and enhancing insulin sensitivity.

Adopt a Mediterranean-style eating pattern by prioritizing plant-based foods, healthy fats like olive oil, and moderate protein from fish and poultry. This approach is linked to lower risks of heart disease and stroke. Focus on long-term adherence rather than strict calorie counting.

The Mediterranean diet reduces visceral adiposity and insulin resistance, key drivers of metabolic syndrome.

Focus on reducing visceral fat by following a Mediterranean diet rich in fiber and healthy fats. This helps improve insulin sensitivity and reduces the risk of metabolic syndrome, even if total body weight changes are gradual.

GLP-1 receptor agonists (specifically liraglutide and semaglutide) produce the greatest weight loss among anti-diabetic medications, with effects classified as strong (>5% reduction), whereas DPP-4 inhibitors and alpha-glucosidase inhibitors (acarbose) produce only mild or neutral effects.

If you have Type 2 Diabetes and struggle with weight loss, GLP-1 receptor agonists (like liraglutide or semaglutide) are currently the most effective pharmacological option for reducing body weight, significantly outperforming older drugs like DPP-4 inhibitors or acarbose. While these drugs may cause initial gastrointestinal side effects, their ability to produce strong weight loss (>5%) makes them a superior choice for managing obesity in diabetic patients compared to weight-neutral or weight-gain-inducing alternatives like sulfonylureas or insulin.