Browse the evidence

Herbal medicine interventions for obesity exhibit pleiotropic mechanisms, including thermogenesis, inhibition of pancreatic lipase, reduced food intake, and increased lipolysis, mediated by secondary metabolites like flavonoids and saponins.

Herbal medicines for obesity work through multiple pathways, such as boosting metabolism (thermogenesis), blocking fat absorption (lipase inhibition), and reducing appetite. They are not single-target drugs but complex mixtures that may offer a safer profile than prescription weight-loss drugs, though they still require careful monitoring.

GLP-1 receptor agonists, particularly semaglutide and tirzepatide, are associated with an increased risk of non-scarring hair loss (telogen effluvium and androgenetic alopecia), primarily driven by rapid weight loss and nutritional deficits rather than direct drug toxicity.

If you are using semaglutide or tirzepatide and notice hair shedding, it is likely due to rapid weight loss or nutritional deficits rather than permanent drug damage. Ensure adequate protein and micronutrient intake (iron, zinc) and consider slowing dose escalation. The risk is highest with these specific drugs and in females, but often stabilizes as weight loss plateaus.

Short-term resistance training (4 weeks) combined with medium-dose cheese supplementation (13.4g protein/week) optimizes body composition and lipid profiles in healthy untrained adults, whereas low-dose supplementation fails to produce significant improvements compared to training alone.

If you are new to resistance training, adding a moderate amount of cheese (providing ~13g of protein) on your workout days can help improve your body fat and cholesterol levels more than training alone. You do not need to consume large amounts of protein; a medium dose (approx. 216g of the specific cheese used) split around your workout is sufficient. Do not expect this to make you stronger faster than training alone, as strength gains were similar across all groups.

Vitamin D3 supplementation alone is the most cost-effective management strategy for sarcopenia in Iran, whereas combination therapies (Protein+Vitamin D, Protein+Vitamin D+Exercise) are not cost-effective despite higher clinical effectiveness.

For healthcare systems or individuals in Iran, Vitamin D3 supplementation is the most economically sensible intervention for managing sarcopenia. While adding protein and exercise improves health outcomes (QALYs), the high cost of these combinations makes them not cost-effective compared to Vitamin D alone. Focus on Vitamin D for the best economic return.

Resistance training responsiveness is highly heterogeneous, with non-responder rates ranging from 0% to 84% for muscle size, 0% to 44% for strength, and 37-42% for functional performance, indicating that individual ability to respond varies widely regardless of the intervention.

Do not assume resistance training will yield identical results for everyone. If you are not seeing expected gains in strength or size after 4-12 weeks, you may be a 'non-responder' for that specific protocol. This is common (up to 84% for muscle size in some studies). Consult a professional to adjust volume, intensity, or exercise selection rather than abandoning training entirely.

In older adults, daily coffee consumption is associated with a decrease in body fat percentage, whereas consuming coffee only a few times per week is associated with an increase in body fat percentage compared to daily consumers.

If you are an older adult, drinking coffee daily might be associated with lower body fat compared to drinking it sporadically. However, this effect is small, and the study suggests it may be indirect (e.g., via gut microbiota or appetite). Do not rely on coffee alone for fat loss; focus on overall diet and activity.

High anabolic responders to resistance training exhibit greater baseline mitochondrial volume (citrate synthase activity) than low responders, suggesting mitochondrial capacity may facilitate muscle hypertrophy.

If you are struggling to build muscle despite consistent training, your mitochondrial capacity might be a limiting factor. While resistance training doesn't always increase mitochondria, high 'responders' tend to have higher baseline levels. Focus on general cardiovascular health alongside lifting to support the energy demands of muscle growth.

Low anabolic responders to resistance training upregulate myofibrillar myozenin-1 (MYOZ1) protein levels, whereas high responders do not, suggesting MYOZ1 may serve as a biomarker for differential adaptation.

This finding is primarily for researchers. For trainees, it suggests that 'low responders' might be using different molecular pathways (like MYOZ1) to adapt compared to 'high responders'. There is no direct training intervention based on this yet.

Deliberately faster eccentric phases during squats and bench presses enhance concentric performance (peak velocity) at submaximal loads (60% 1RM), but may not benefit those who already use fast eccentrics.

If you are a trained lifter, try using a faster lowering phase (eccentric) during your squats and bench presses at lighter loads (60% 1RM). This can help you move the bar faster during the lifting phase. However, if you already train with fast eccentrics, switching to slow ones won't give you extra benefits.

Higher body mass index (BMI) is associated with lower self-reported physical functioning and overall health-related quality of life (HRQoL) in people with overweight or obesity.

If you have overweight or obesity, your daily physical ability and general health perception are likely lower than average, and this tends to get worse as your BMI increases. This is a measurable health burden, not just a cosmetic issue, and addressing weight may improve your physical functioning.

The presence of cardiovascular (CV) or metabolic comorbidities significantly reduces health-related quality of life (HRQoL) and work productivity in people with overweight or obesity, often more so than BMI alone.

Having overweight or obesity is only part of the story. If you also have heart or metabolic conditions (like diabetes), your quality of life and work productivity are likely significantly lower than someone with the same BMI but no comorbidities. Treating these specific conditions is crucial for your well-being.

People with overweight or obesity and metabolic comorbidities experience significantly higher work impairment (activity impairment and presenteeism) compared to those without such comorbidities.

If you have overweight or obesity and metabolic conditions like diabetes, your work productivity is likely significantly lower than someone with the same BMI but no metabolic issues. This is due to reduced activity levels and effectiveness at work, which are key targets for treatment.

Current interventions, including calorie restriction, physical activity, and pharmacological treatment, show promise in combating obesity, but long-term efficacy and safety need further establishment.

There is no single magic bullet for obesity. The most promising approach combines lifestyle changes (diet and exercise) with medical treatments if necessary. However, long-term success is not guaranteed, and ongoing management is likely required.

Intensive multi-factorial pharmacotherapy combined with intensive lifestyle interventions significantly reduces estimated coronary heart disease (CHD) and stroke risk in newly diagnosed type 2 diabetes patients compared to conventional therapy over a 1-year period.

For newly diagnosed type 2 diabetes patients, adopting an intensive multi-factorial therapy approach that includes both medication and lifestyle changes (diet, exercise, education) can significantly reduce the risk of heart disease and stroke within just one year. This approach is feasible in daily practice and can be implemented without overwhelming patients or physicians.

Laparoscopic bariatric surgery (specifically RYGB and SG) produces greater weight loss and higher rates of type 2 diabetes remission compared to non-surgical interventions, including lifestyle changes and GLP-1 receptor agonists.

For severe obesity, laparoscopic surgery (like gastric bypass or sleeve) currently offers the highest chance of significant, sustained weight loss (20-30%) and diabetes remission compared to drugs or diet alone. However, it requires lifelong vitamin supplementation and carries surgical risks. New medications (GLP-1s) are closing the gap, offering 15-20% loss, but surgery remains the most effective option for those who qualify.

High-intensity physical activity significantly reduces the risk of metabolic dysfunction-associated steatotic liver disease (MASLD) in individuals with stable obesity, whereas high-intensity activity combined with significant net weight gain (>20 kg) paradoxically increases MASLD risk compared to lower intensity activities.

If you have stable obesity, high-intensity exercise (over 1200 MET min/week) is significantly better for your liver than low-intensity activity. However, if you are gaining a lot of weight (>20kg) over time, high-intensity exercise might actually increase your liver disease risk compared to moderate or low intensity. Focus on maintaining stable weight with high intensity, or use moderate intensity if you are struggling with weight gain.

Tapering after intense training induces a 'Type IIx overshoot,' where fast-twitch fiber characteristics and power output increase beyond pre-training levels.

If you are an endurance athlete, do not fear reducing your training volume before a major event. A proper taper can lead to an 'overshoot' in fast-twitch fiber power, helping you perform better in sprints or hills at the end of a race.

Consumption of fermentable dietary fiber (specifically oligosaccharides, resistant starch, and chemically synthesized fibers) modulates gut microbiota composition by increasing the abundance of Bifidobacteria and altering bacterial fermentation profiles, leading to increased short-chain fatty acid (SCFA) production.

To positively influence your gut microbiota, incorporate fermentable fibers like oligosaccharides (found in onions, garlic, bananas) or resistant starch (cooled potatoes/rice). Most studies show these increase beneficial Bifidobacteria. Start with small amounts to minimize digestive discomfort and gradually increase intake.

A comprehensive lifestyle intervention combining a hypocaloric Mediterranean diet, structured physical activity, and cognitive behavioral therapy is the recommended clinical practice for managing obesity in Type 1 Diabetes, despite evidence being scarce.

For T1D patients with obesity, start with a multidisciplinary team approach. Adopt a hypocaloric Mediterranean diet (500-1000 kcal deficit) and aim for 150 minutes of moderate exercise weekly. Crucially, work with your care team to adjust insulin doses to prevent hypoglycemia, which is the main barrier to adherence.

Adherence to a Mediterranean diet is associated with decreased mortality and lower disease activity in patients with Inflammatory Bowel Disease (IBD), though direct causal evidence from large randomized controlled trials is currently lacking.

If you have IBD, increasing your adherence to a Mediterranean-style diet (high in vegetables, fruits, whole grains, nuts, and olive oil; low in red meat) is associated with lower mortality and reduced disease activity. While large randomized trials are still pending, current observational data strongly supports this as a beneficial adjunctive strategy.

In men with type 2 diabetes, performing the majority of moderate-to-vigorous physical activity (MVPA) bouts in the morning is associated with higher cardiorespiratory fitness but also a higher 4-year Framingham Risk Score (FRS) for coronary heart disease compared to mixed timing, independent of total MVPA volume and intensity.

If you are a man with type 2 diabetes, try to schedule your most intense 10-minute activity bursts (like brisk walking or cycling) in the morning (5 AM - 10:42 AM). This timing is linked to better heart fitness. However, do not stress if you miss the morning window; the total amount of activity is still the most important factor. If you are a woman, this specific morning benefit was not observed; focus on getting your total weekly activity goals met regardless of the time of day.

Personalized nutrition, incorporating genetic analysis (SNPs), gut microbiota assessment, and chrono-nutrition, is an effective preventive measure against atherosclerosis, superior to generic dietary advice.

To prevent atherosclerosis, move beyond generic diets. Consider getting genetic testing (SNPs) and gut microbiota analysis to tailor your diet. Focus on foods that support your specific genetic profile and gut health, such as those rich in antioxidants and anti-atherosclerotic substances.

Exercise-induced dehydration (approx. 3.5% body mass loss) significantly increases Resting Metabolic Rate (RMR) and reduces Heart Rate Variability (HRV) compared to rehydration, indicating that hydration status must be controlled for accurate physiological assessment.

If you are tracking your recovery using Heart Rate Variability (HRV) or Resting Metabolic Rate (RMR), you must be fully hydrated. Dehydration artificially lowers HRV (making you look overtrained) and raises RMR (skewing energy expenditure data). Ensure you are euhydrated before any physiological assessment to get accurate baselines.

Participating in a high-altitude ultramarathon (161 km) causes significant, transient elevations in cardiac troponin I (cTnI) and creatinine levels, with higher intensity (faster finish times) correlating with greater cTnI release.

If you complete a 100-mile race, expect your cardiac and kidney biomarkers to spike temporarily. This is a normal physiological response to extreme stress, not necessarily a sign of injury. Ensure adequate recovery and hydration, but do not assume permanent damage based on post-race blood tests alone.