Browse the evidence

SGLT2 inhibitors reduce body weight and blood pressure, contributing to their overall benefit in CRM syndrome.

SGLT2 inhibitors typically lead to a modest weight loss of 1.5-3 kg over 1-2 years, which is a beneficial side effect for managing metabolic syndrome.

Skeletal muscle loss during pharmacologically induced weight loss is clinically significant because excessive SMM loss reduces resting energy expenditure (REE), making weight maintenance more difficult.

To maintain weight loss, preserving muscle is critical because muscle burns calories at rest. If you lose too much muscle, your metabolism slows down, making it harder to stay lean. Ensure your weight loss plan includes adequate protein and resistance training to protect muscle mass.

Bariatric surgery is indicated for patients with BMI >= 40 kg/m2 or >= 35 kg/m2 with comorbidities, and offers benefits beyond weight loss including glycemic control and improved life expectancy.

If your BMI is 40+ (or 35+ with health issues), surgery is a valid option. It's not just weight loss; it can fix diabetes and other issues. Choose an experienced surgeon and commit to long-term follow-up.

Dietary capsinoids (9 mg/day) increase resting energy expenditure and brown adipose tissue density in healthy and overweight middle-aged adults.

Take 9 mg of capsinoids daily. This simple supplement has been shown in human trials to increase your resting energy expenditure and increase the amount of active brown fat, even in overweight individuals. It is a low-effort way to slightly boost your metabolic rate.

Caffeine (375 mg capsule or equivalent from coffee/tea) increases energy expenditure and brown adipose tissue activity in physically active humans.

Consume 375 mg of caffeine (or equivalent from coffee/tea) 30 minutes before activity. This has been shown to increase energy expenditure and activate brown fat, particularly in physically active men. It is a practical way to leverage a common substance for metabolic benefit.

Dietary weight loss interventions result in a consistent percentage of lean mass loss (approximately 29-30%) regardless of the total magnitude of weight lost, provided the loss exceeds 5% of baseline body weight.

If you lose weight through diet, expect to lose about 30% of that weight as lean mass, regardless of whether you lose 5% or 15% of your body weight. This is a consistent biological response to caloric restriction, not a failure of your diet. To mitigate this, incorporate resistance training, as the paper notes this is a benchmark for 'dietary modifications' without medication.

Total daily energy expenditure (TDEE) declines significantly with age in both males and females, primarily driven by reductions in fat-free mass and increases in fat mass, with the most substantial drop occurring during the transition from middle age to older adulthood.

Your daily calorie needs drop as you age, especially after 55. This isn't just 'hormones'; it's largely because you lose muscle (fat-free mass) and gain fat. To maintain your weight, you must adjust your caloric intake or increase activity to match this lower expenditure. Focus on preserving muscle mass through resistance training to keep your metabolic rate higher.

Females have a higher percentage of body fat and fat mass, and lower fat-free mass compared to males across all age groups, but the trajectory of body composition change with age is similar between sexes.

Women naturally carry more fat and less muscle than men, which lowers their baseline calorie needs. However, as you age, your body composition changes (losing muscle, gaining fat) in a pattern very similar to men. Focus on strength training to preserve muscle mass; this is the most effective way to counteract the age-related drop in energy expenditure for both sexes.

Orlistat is an affordable option with lower effectiveness, making it a practical alternative in resource-limited settings.

Orlistat (120 mg three times daily) is an affordable option for weight loss, but it has lower effectiveness compared to newer drugs like Semaglutide, making it a practical choice primarily in resource-limited settings.

Bariatric surgery results in greater weight loss and improvement in cardiac troponins compared to intensive lifestyle intervention alone in patients with severe obesity.

For severe obesity, bariatric surgery is more effective than lifestyle changes alone for weight loss and improving heart health markers like cardiac troponins. It is considered when other treatments fail.

Hypoglossal nerve stimulation (HNS) produces substantial, durable improvements in AHI and symptoms with high adherence, supported by randomized trials and real-world data.

If you have moderate-to-severe sleep apnea and cannot tolerate CPAP, ask about hypoglossal nerve stimulation (HNS). It is an implanted device that stimulates the tongue to keep the airway open, offering substantial and durable relief for the right candidate.

Military operational factors including deployments, restricted food choices, and limited physical exercise opportunities significantly contribute to the development and maintenance of obesity among service members.

If you are in the military, especially in the Navy or on deployment, your environment is designed to promote weight gain through limited fresh food and exercise options. Focus on what you can control within those constraints, such as seeking out fresh food when possible and maximizing movement opportunities, while advocating for better food and exercise access at the unit level.

High energy expenditure during combat training and field exercises, often exceeding 4000-7000 kcal/day, combined with limited energy intake, leads to Relative Energy Deficiency in Sport (RED-S) syndrome, causing detrimental health and performance outcomes.

During intense training or deployment, your body may burn 4000-7000+ calories. If you don't eat enough to match this, you risk RED-S, which harms your hormones, bones, and immune system. Prioritize eating enough to cover your energy expenditure to maintain long-term health and performance.

Caloric restriction and time-restricted feeding can extend healthspan and lifespan in animal models and improve metabolic health in humans, sometimes without weight loss, by reshaping molecular pathways in adipose tissue and aligning with circadian rhythms.

Try time-restricted feeding or caloric restriction without focusing solely on weight loss. Align your eating window with your circadian rhythm (e.g., eat earlier in the day) to maximize metabolic benefits and potentially extend healthspan, even if your weight doesn't change.

Intermittent fasting (IF) regimens produce weight loss results statistically similar to traditional Caloric Energy Restriction (CER).

You can achieve the same amount of weight loss with intermittent fasting as you can with standard calorie counting. Choose the method that you can stick to long-term.

Low-carbohydrate diets produce significantly greater short-term weight loss (3-8 months) in obese individuals compared to non-carbohydrate-restricted diets, but this advantage disappears in the long term (10-30 months).

If you are obese, a low-carb diet will help you lose more weight than a standard balanced diet for the first 6-8 months. However, do not expect this advantage to last beyond a year; after 10 months, your weight loss will likely match that of someone on a balanced diet. The key benefit of LC diets in the long run is not weight loss, but improved lipid profiles (lower triglycerides, higher HDL).

Performing 250 minutes per week of self-paced aerobic exercise yields modest weight loss regardless of whether the exercise is performed in the morning (06:00–09:00) or evening (16:00–19:00).

If you want to lose weight, focus on getting 250 minutes of moderate aerobic exercise per week. It does not matter if you do it in the morning or the evening; the weight loss results are the same. Choose the time that fits your schedule best to ensure you stick with it.

An 8-week sulfur amino acid restriction (SAAR) diet (~2 g/day) in humans with overweight or obesity produces significantly greater weight loss (~20% greater) compared to a control diet (~5.6 g/day), despite maintaining similar resting metabolic rates.

To lose more weight than standard dietary restriction, try reducing sulfur amino acids (methionine and cysteine) to about 2 grams per day for 8 weeks. This can be done by eating a plant-based diet and avoiding high-sulfur supplements or specific high-sulfur foods, while allowing one flexible meal a week to maintain social life. Expect roughly 20% more weight loss than a standard control diet, even if your resting metabolism doesn't change.

Metabolic adaptation (a lower-than-predicted resting metabolic rate after weight loss) significantly increases the time required to reach specific weight loss goals, independent of dietary adherence.

If you are strictly following a calorie deficit but your weight loss has stalled or slowed significantly, it may be due to metabolic adaptation (a drop in your resting metabolic rate). This is a biological defense mechanism, not a personal failure. Adjusting expectations regarding the timeline, rather than just increasing restriction, is necessary.

Fasting-based strategies (FBS) produce slightly greater short-term weight loss and fat mass reduction compared to continuous caloric restriction (CCR) in obese adults, but these differences are not clinically significant and disappear in long-term interventions (>6 months).

If your goal is weight loss, fasting strategies (like time-restricted eating) might help you lose a bit more weight and fat in the first few months compared to simply counting calories every day. However, this advantage is small (less than 1 kg) and disappears after 6 months. Since both methods result in similar long-term weight loss, choose the approach that fits your lifestyle and is easier for you to maintain consistently.

Intermittent Energy Restriction (IER) produces short-term weight loss comparable to Continuous Energy Restriction (CER), but offers no significant long-term advantages in anthropometric, cardiometabolic, inflammatory, or appetite outcomes.

If you are considering Intermittent Fasting for weight loss, expect it to work similarly to standard daily calorie restriction in the short term. Do not expect it to provide better long-term health or weight maintenance results than simply counting calories every day. The choice between IER and continuous restriction should be based on which pattern you can stick to consistently, as neither offers a long-term advantage over the other.

Intermittent Energy Restriction (IER) combined with High-Intensity Interval Training (HIIT) produces greater reductions in body weight, body fat percentage, waist circumference, and hip circumference compared to Continuous Energy Restriction (CER) combined with HIIT in overweight/obese adults, although the difference is not statistically significant in a 4-week trial.

If you are overweight or obese, combining High-Intensity Interval Training (HIIT) with an Intermittent Energy Restriction (IER) diet may help you lose more weight and body fat than a standard daily calorie-restricted diet over a short period. Specifically, eating only 30% of your daily calorie needs on two non-consecutive days a week, while eating normally on the other five days, resulted in nearly double the weight loss (4.6 kg vs 2.5 kg) compared to eating 70% of your needs every day. Although the difference wasn't statistically significant in this small 4-week study, the trend favors IER for body composition improvements.

Weight loss acts as a significant moderator for the effect of combined interventions on visceral fat area (VFA), but not for liver fat or intramuscular triglycerides (IMTG).

Losing weight helps reduce visceral fat, but it may not be enough to reduce liver or muscle fat. If you have concerns about liver or muscle fat, you may need additional strategies beyond just weight loss.

Time-restricted eating (TRE) combined with caloric restriction (CR) does not yield superior weight loss compared to caloric restriction alone in overweight and obese women.

If you are already restricting calories to lose weight, adding a strict eating window may not give you any extra weight loss benefit. You can achieve similar results with just calorie control.