Browse the evidence

Leucine-rich high protein supplementation (50.6 g protein and 6 g leucine daily) does not significantly improve body composition or muscle function in older adults with sarcopenia over a 12-week period, despite upregulating specific gene expression related to ATP production and DNA repair.

For older adults with sarcopenia, taking leucine-rich protein supplements alone for 12 weeks will not significantly increase muscle mass or improve physical function. While it may positively influence gene expression related to energy production, it is not a standalone solution for reversing sarcopenia. To see functional benefits, supplementation should likely be combined with resistance exercise.

Higher neighborhood-level socioeconomic disadvantage is associated with weaker statistical interactions (correlations) among the stages of adiposity, dysglycemia, and hypertension, suggesting that in disadvantaged populations, these cardiometabolic drivers develop more independently of one another.

If you live in a high-disadvantage neighborhood, standard assumptions about how weight affects blood sugar and blood pressure may not apply to you. The link between carrying extra weight and developing high blood sugar or high blood pressure is weaker in these settings. This suggests that factors like chronic stress, limited access to healthy food, and environmental stressors play a larger, independent role in your cardiometabolic health. Screening and prevention strategies should account for these social determinants rather than focusing solely on weight management.

Prolonged oral processing (chewing) increases in vitro protein and lipid digestion efficiency by mechanically breaking down the food matrix, but this does not necessarily translate to altered in vivo glycaemic responses in healthy individuals.

For healthy individuals, chewing your food more thoroughly will help your stomach enzymes break down proteins and fats more efficiently in the lab setting, but it won't significantly change your blood sugar levels or metabolic health. If you have pre-diabetes, thorough chewing may help regulate blood sugar, but for the general healthy population, the food's physical structure (e.g., whole nuts vs. ground) matters more for nutrient absorption than chewing time alone.

Homogenizing fecal samples (via blending or pneumatic mixing) significantly reduces intra-individual variation in detected bacterial diversity compared to sampling small, non-homogenized aliquots, thereby improving the reliability of microbiome assessments.

If you are analyzing gut microbiota from stool samples, do not just take a tiny piece from one spot. Mix the entire sample thoroughly (homogenize) before extracting DNA. This step is crucial to get a consistent and accurate picture of the bacteria present, as bacteria are not evenly distributed throughout the stool.

Fecal processing methods (freezing and homogenization) can significantly alter the relative abundance of specific bacterial taxa, particularly increasing Faecalibacterium, Streptococcus, and Bifidobacterium, while decreasing Oscillospira, Bacteroides, and Parabacteroides.

When comparing gut microbiome studies, be aware that how the stool was processed (frozen/homogenized vs. fresh/unmixed) can change the reported levels of specific bacteria like Faecalibacterium and Bacteroides. This is a technical artifact, not necessarily a biological difference.

A 9-month combined aerobic and resistance exercise program does not reduce skeletal muscle macrophage accumulation in obese individuals with type 2 diabetes.

If you have type 2 diabetes and are obese, doing 9 months of combined aerobic and resistance exercise is excellent for improving blood sugar control, but do not expect it to significantly reduce the number of inflammatory cells (macrophages) in your skeletal muscle. The metabolic benefits are real, even if the structural inflammation markers remain unchanged.

Skeletal muscle macrophage content is not significantly different between young and elderly subjects, despite higher inflammation gene expression in the elderly.

Aging is associated with higher gene expression for inflammation, but this does not translate to more inflammatory cells in your muscles. You do not need to treat 'age-related muscle inflammation' as a distinct structural problem if your macrophage levels are normal.

Estimating individual dietary intake from household-level consumption data using standard allocation methods (Adult Male Equivalent or Per Capita) systematically overestimates actual individual consumption for nearly all food groups and nutrients.

If you are using household budget data to guess what one person eats, assume the numbers are too high. The error is not random; it consistently overestimates intake, especially for fruits, vegetables, and vitamins. Do not use these estimates for individual clinical advice; they are only useful for broad population-level trends if corrected for this known bias.

Substituting plant-based meats for animal meats for 8 weeks does not significantly improve biomarkers of inflammation in generally healthy adults.

Swapping animal meat for plant-based meat alternatives for 8 weeks is unlikely to reduce your inflammation markers if your overall diet remains unchanged. These products are often ultra-processed, which may negate potential benefits. Focus on whole, unprocessed plant foods rather than just substituting meat analogues.

Contrast-enhanced ultrasound (CEUS) using gamma variate modeling of bolus microbubble injection provides a valid, noninvasive, and reproducible method for quantifying skeletal muscle microvascular perfusion in vivo.

If you are researching vascular health in older adults or those with metabolic disease, use Contrast-Enhanced Ultrasound (CEUS) with gamma variate modeling. This method allows you to see exactly how well blood flows into skeletal muscle at rest and during exercise, offering a much clearer picture of health than standard artery stiffness tests alone.

Type 2 diabetes is associated with an increased risk of developing various cancers, including breast, liver, pancreas, rectum, and urinary tract cancers.

If you have type 2 diabetes, be aware of the increased risk for certain cancers. Regular screenings for breast, liver, pancreas, rectal, and urinary tract cancers may be advisable in consultation with your doctor.

Moderate to severe weight change (loss or gain) of ≥5% within a 2-year interval is associated with a significantly increased risk of suicide mortality, exhibiting a reverse J-shaped curve.

If you experience rapid, unintentional weight loss or gain (≥5% in 2 years), it is a significant physiological stress signal. While weight loss is often pursued for health, rapid changes—especially if unexplained by diet/exercise—warrant medical and psychological evaluation to rule out underlying conditions or mental health risks, rather than simply viewing the change as a success or failure.

The Obesity Lifecycle Model demonstrates favorable concordance with observed clinical and quality-of-life outcomes, validating its use for evaluating obesity-related complications and informing healthcare decision making.

Healthcare decision-makers can use the Obesity Lifecycle Model to assess the cost-effectiveness of obesity therapies with confidence, as it has been validated to accurately predict clinical complications and quality-of-life impacts.

Postoperative exercise training does not significantly affect lean body mass in adults undergoing bariatric surgery.

While exercise training may not significantly increase lean body mass after bariatric surgery, it can still improve muscle strength and function. Focus on building strength and endurance rather than just muscle mass.

Both bariatric surgery (RYGB/SG) and structured medical treatment (VLED) result in similar safety profiles regarding hospitalization, need for further surgery, and mortality at 2-year follow-up, despite differences in weight loss magnitude.

Safety outcomes, including hospitalization and mortality, are comparable between bariatric surgery and structured medical treatment at 2 years. This suggests that for many patients, the higher efficacy of surgery does not come with a proportionally higher immediate safety risk compared to medical management.

Unchecked obesity trends in the US population are projected to cause a decline or leveling off of life expectancy in the first half of the 21st century, reversing historical gains.

The steady rise in life expectancy is ending due to obesity. To maintain or extend your lifespan, you must address obesity now, as medical treatments for resulting diseases like diabetes and heart disease are insufficient to counteract the mortality risk. Focus on preventing obesity, especially in children, as the primary lever for longevity.

Unprocessed red meat consumption is not significantly associated with the incidence of coronary heart disease or type 2 diabetes mellitus.

You do not need to eliminate unprocessed red meat (beef, lamb, pork) from your diet to avoid heart disease or diabetes, based on this analysis. The significant risks are specifically linked to processed meats.

Obstructive sleep apnea (OSA) is highly prevalent and largely unrecognized in patients with drug-resistant hypertension, with a prevalence of 83% in a specific cohort, significantly higher than in the general population.

If your blood pressure remains high despite taking three or more medications, ask your doctor about screening for sleep apnea. It is a very common, often silent cause of resistant hypertension, and treating it can significantly improve your blood pressure control.

For a given waist circumference or BMI, white adults have higher levels of visceral adipose tissue (VAT) than African-American adults, particularly at higher levels of adiposity.

If you are African-American, your waist circumference might underestimate your visceral fat risk compared to a white person with the same waist size. White adults tend to store more visceral fat at the same waist measurement. This means standard waist cut-offs might need to be lower for white adults to accurately flag visceral fat risk, or higher for African-American adults, though specific thresholds require further research.

Women have higher levels of subcutaneous adipose tissue (SAT) and fat mass (FM) than men for any given waist circumference or BMI.

If you are a woman, your BMI or waist circumference likely underestimates your total body fat and subcutaneous fat compared to a man with the same measurements. Women store more fat in the subcutaneous layer. This means standard 'healthy' ranges for BMI/WC might not reflect the same level of total adiposity for women as they do for men.

Increasing dietary intake of marine n-3 fatty acids or fish consumption from low levels (1 serving/month) to high levels (6+ servings/week) does not substantially reduce the risk of coronary heart disease in men without preexisting cardiovascular disease.

If you are a healthy man, eating more fish (up to 6 servings a week) or increasing your marine n-3 fatty acid intake is unlikely to significantly lower your risk of coronary heart disease. While fish is part of a healthy diet, this study suggests that dietary amounts are insufficient to provide the protective cardiovascular effects often attributed to fish oil supplements, which require much higher doses.

Consumption of fish and seafood is not significantly associated with the incidence of type 2 diabetes in the general population, though risk varies by geographic location and BMI.

You do not need to eat fish or take fish oil specifically to prevent type 2 diabetes, as current evidence shows no significant overall benefit for diabetes risk. However, fish remains important for heart health. Focus on overall dietary patterns and weight management rather than expecting fish to act as a diabetes shield.

Caffeine intake of 6 mg/kg does not significantly alter total carbohydrate or fat oxidation rates during steady-state exercise, despite changing plasma metabolite profiles.

Don't worry about caffeine changing your body's fuel usage (fat vs. carbs) during exercise. The study shows it doesn't significantly change how much fat or carbs you burn. The performance boost likely comes from feeling less effort and better nervous system function, not from sparing glycogen.

Post-diagnosis weight loss of >10 kg is associated with a 2.66 times greater all-cause mortality compared to maintaining stable weight.

Significant weight loss after a breast cancer diagnosis (more than 10kg) is associated with a much higher risk of death. While weight loss is often seen as positive, unexplained or large weight loss can be a sign of underlying health problems. Survivors should report significant weight loss to their care team to rule out other causes, rather than assuming it is a positive outcome.