Browse the evidence

Chronic nutrient overload and sedentary behavior lead to 'oxidative distress' (excessive ROS), which causes insulin resistance in skeletal muscle by activating stress kinases (JNK, p38 MAPK) that inhibit insulin signaling.

Insulin resistance in skeletal muscle often starts with chronic nutrient overload, not just sugar. When you consistently consume more energy than you burn, it creates 'oxidative distress' that blocks insulin signals. Managing total energy balance and activity levels is critical to preventing this specific type of metabolic damage.

SGLT2 inhibitors improve mitochondrial function and reduce oxidative stress, contributing to their cardioprotective and renoprotective effects.

SGLT2 inhibitors may help your cells produce energy more efficiently and reduce cellular stress, which protects your heart and kidneys. This is part of why these drugs work beyond just lowering blood sugar.

Bone Mineral Content (BMC) continues to decline during the weight regain phase (6-12 months) even when total body weight and fat mass are increasing.

If you lose a significant amount of weight (5% or more), your bone density may drop. This drop can continue even if you regain some of the weight later. To protect your bones, consider baseline bone density assessments if you are at risk (e.g., postmenopausal women) and ensure adequate calcium and vitamin D intake alongside resistance training.

Standard questionnaires (7dPAR, BWHS) and prediction equations (DRI, BOD POD) are valid for estimating Total Energy Expenditure (TEE) at a group level but lack sufficient accuracy for individual assessment due to wide limits of agreement and low correlation with the gold standard (DLW).

Use questionnaires and standard equations to estimate your energy needs for general planning or group studies, but do not rely on them for precise individual calorie targets. The error margin is too large (potentially ±1000+ kcal) for effective individual weight management. For individual precision, more rigorous testing or metabolic assessment is required.

Maxillomandibular advancement (MMA) surgery achieves the largest and most durable reductions in OSA severity, with efficacy comparable to CPAP.

If you have severe sleep apnea and cannot use CPAP, ask about Maxillomandibular Advancement (MMA) surgery. It is a major surgery but can provide a permanent, CPAP-level reduction in apnea events for the right candidate.

Intensive lifestyle interventions (diet and exercise) alone are insufficient to prevent significant weight regain after discontinuation of incretin-based therapy, although they may modestly attenuate the rebound.

Even if you commit to intense diet and exercise after stopping your weight loss medication, you will likely regain a significant amount of weight. Lifestyle changes are important for your health, but they are not a substitute for the medication's hormonal effects in preventing regain.

Using weight-dependent prediction equations (Goldberg or pTEE methods) to exclude implausible energy reporters in epidemiologic studies of diet and BMI introduces selection bias and reverses observed associations compared to using simple absolute caloric cutoffs.

When analyzing diet and weight data, avoid using complex formulas that exclude people based on their weight if your outcome is also weight-based (like BMI). This creates a statistical illusion. Simple cutoffs for extreme calorie reporting (e.g., <500 or >3500 kcal/day) are often sufficient and less prone to bias. For prospective changes in weight, the method of exclusion matters less.

In institutionalized elderly residents with dementia, higher physical and cognitive dependency and decreased appetite are significant predictors of body weight loss, whereas higher baseline BMI and fat intake predict weight gain.

For elderly nursing home residents with dementia, do not automatically assume weight loss is due to illness or medication. The study shows that physical/cognitive dependency and decreased appetite are the key drivers of weight loss. Conversely, higher fat intake and higher baseline BMI are associated with weight gain. Care plans should focus on managing dependency levels and addressing appetite issues (possibly linked to dementia/depression) rather than restricting fat or focusing solely on chronic disease management, as these were not associated with weight changes in this specific population.

The age-related decline in resting metabolic rate (REE) is driven by the loss of body cell mass (BCM) rather than an intrinsic slowing of cellular metabolism, and this loss is only accurately captured by Total Body Potassium (TBK) measurement.

Your metabolism doesn't inherently slow down as you age; rather, you lose the metabolically active tissue (muscle and cells) that drives it. To maintain your energy expenditure, you must prioritize preserving muscle mass through resistance training and adequate protein intake, rather than accepting metabolic decline as inevitable.

In nonagenarians (≥90 years), declining health (higher frailty index) is associated with an elevation in resting metabolic rate (RMR), which may be driven by decreased muscle mass in women and decreased muscle function (damage) in men.

For those in their 90s, maintaining muscle function is critical not just for movement, but for metabolic health. The study suggests that as health declines, the body burns more energy at rest to maintain itself, potentially draining reserves needed for daily activity. For men, this is linked to muscle damage (enzyme levels); for women, to muscle mass. Preserving muscle quality and quantity may help manage this increased metabolic burden.

Bariatric surgery, by inducing significant weight loss and improving metabolic profiles, reduces the overall incidence of cancer, including esophageal adenocarcinoma.

For individuals with severe obesity, bariatric surgery can significantly reduce the risk of various cancers, including esophageal adenocarcinoma, by promoting sustained weight loss and improving metabolic health.

High waist-to-hip ratio (WHR) is a significant predictor of all-cause mortality, whereas BMI is not, and psychological stress does not directly predict all-cause mortality when WHR is considered.

Do not rely on BMI to assess your long-term health risk. Instead, measure your waist and hip circumferences. A high waist-to-hip ratio is a much stronger predictor of early death than BMI. Focus on reducing abdominal fat through lifestyle changes, as this specific body shape is linked to higher mortality.

Very Low-Calorie Diets (VLCDs, <800 kcal/day) are not recommended for general use due to significant adverse events and require medical supervision.

Avoid Very Low-Calorie Diets (under 800 calories) unless prescribed and monitored by a doctor. The risks, including gallstones and electrolyte imbalances, outweigh the benefits for most people. Stick to moderate calorie restriction (800-1500 kcal) for safer, sustainable weight loss.

Aerobic exercise training in the absence of weight loss does not significantly improve fasting glucose, fasting insulin, or lipoprotein concentrations (HDL-C, LDL-C) compared to a control group, although it does increase VO2max.

If you start exercising but do not lose weight, your cardiovascular fitness will likely improve, but your blood sugar, insulin, and cholesterol levels may not change significantly. To fix metabolic health markers, you must also lose weight through diet.

High consumption of ultra-processed foods does NOT significantly increase the risk of incident obesity (BMI ≥ 30 kg/m²) in individuals who are already overweight (BMI 25-30 kg/m²) at baseline.

For those already overweight, simply reducing UPF may not be enough to prevent progression to obesity; other lifestyle factors may play a larger role.

Prolonged energy restriction induces adaptive thermogenesis, causing resting energy expenditure (REE) to fall significantly more than predicted by changes in body composition alone, thereby creating an energetic efficiency that hinders weight loss.

When you diet, your body doesn't just burn less energy because you are smaller; it actively becomes more efficient, burning even less than expected for your new size. This 'adaptive thermogenesis' is strongest during the active weight loss phase. If you hit a plateau, it may be because your body has adapted to the deficit. Recognizing this biological defense mechanism can help you adjust your strategy (e.g., slight diet breaks or resistance training) rather than assuming you are failing.

Low-carbohydrate diets do not increase energy expenditure (resting metabolic rate, thermic effect of food, or physical activity) compared to low-fat diets, and thus cannot explain the greater weight loss observed in low-carbohydrate dieters.

If you are losing more weight on a low-carb diet than a low-fat diet, it is not because your body is burning more calories. Your resting metabolism and the energy cost of digesting food are similar to those on a low-fat diet. The difference likely comes down to how much you actually eat, which may be harder to track accurately on a restricted low-fat diet.

Caloric restriction alone produces significant reductions in liver enzymes (ALT and GGT) in obese metabolic syndrome subjects, and adding moderate-intensity aerobic exercise training provides no incremental benefit on these liver markers.

If you have metabolic syndrome and high liver enzymes, focus on losing weight through a caloric deficit and reducing saturated fats. You do not need to add intense exercise to see improvements in your liver enzymes; diet alone is sufficient for this specific outcome.

In weight-stable interventions, low-fat diet and exercise do not independently improve metabolic syndrome scores; the improvement is entirely mediated by the loss of percent body fat.

If you are doing a low-fat diet or exercising to fix metabolic syndrome, the benefit you see is likely due to the small amount of body fat you lost, not the diet or exercise itself. If you cannot lose body fat, these specific interventions may not improve your metabolic syndrome score. Focus on achieving fat loss, regardless of the method.

Exercise intervention alone (4x 45-min walks at 60-70% max heart rate) during lactation does not significantly improve cardiovascular risk factors (blood lipids, insulin, blood pressure) or VO2 max in overweight/obese women.

For postpartum women, moderate-intensity walking alone (4x 45 mins/week) may not be sufficient to improve cardiovascular risk factors or fitness levels. While it is a healthy activity, it did not drive metabolic improvements in this study, whereas dietary changes did. Focus on diet for metabolic health improvements in this specific population.

Twice-per-week intermittent fasting (5:2 diet) is not superior to continuous energy restriction for weight loss or insulin resistance in night shift workers, though it may offer specific lipid benefits.

For night shift workers, a 5:2 intermittent fasting plan (eating ~500 kcal on 2 non-consecutive days) is just as effective for weight loss as eating slightly less every day. It does not offer superior metabolic benefits like insulin sensitivity, but it may help lower LDL cholesterol. Choose the method that fits your schedule best, as adherence is key.

Time-restricted eating (TRE) does not significantly improve BMI, fat mass, blood lipids, glucose, or blood pressure in overweight and obese women compared to control groups.

Do not expect TRE to automatically fix your BMI or cholesterol levels if you do not also manage your total calorie intake. While it helps with weight and insulin, it does not significantly alter fat mass or blood pressure on its own in this population.

Combining Time-Restricted Eating (TRE) with Energy Restriction (ER) provides no additional benefit for weight loss or fat mass reduction compared to TRE alone.

If you are already practicing Time-Restricted Eating, you do not need to add explicit calorie counting or energy restriction to achieve weight loss. TRE alone is sufficient for significant fat and weight reduction. Adding calorie restriction does not provide extra benefits for weight loss in this context.

Increasing exercise dose (frequency, duration, intensity, or total energy expenditure) does not increase the magnitude of energy compensation (the body's compensatory response), meaning higher doses are required solely to overcome a fixed compensatory threshold rather than to avoid greater compensation.

If you are exercising to lose weight, doing more exercise does not cause you to compensate by eating more or storing more fat than a smaller amount of exercise would. The body's 'compensatory response' is roughly fixed (around 1,000 kcal/week). To lose fat, you must simply exceed this threshold. Therefore, higher exercise doses are not 'futile' due to compensation; they are necessary to create a net deficit large enough to result in fat loss.