Browse the evidence

Overfeeding saturated fatty acids (SFAs) promotes hepatic and visceral fat storage, whereas overfeeding polyunsaturated fatty acids (PUFAs) promotes lean tissue gain in healthy, normal-weight individuals.

If you are in a caloric surplus, the type of fat you consume matters for body composition. Replacing saturated fats (like palm oil) with polyunsaturated fats (like sunflower oil) may help direct excess calories toward lean tissue rather than liver and visceral fat, provided you are healthy and normal-weight. This does not apply to obese or insulin-resistant individuals based on this study.

Diet-induced weight loss causes persistent perturbations in circulating appetite hormones (increased ghrelin, decreased leptin/PYY/GLP-1) that favor weight regain and persist for at least one year.

After losing weight, your body produces more hunger hormones (like ghrelin) and fewer satiety hormones (like leptin and GLP-1). This biological shift makes you hungrier and less full, promoting weight regain. This effect can last for a year or more, explaining why maintaining weight loss is biologically challenging.

Weight loss leads to a disproportionate decrease in Resting Energy Expenditure (REE) compared to the loss of body mass, creating a metabolic adaptation that favors weight regain.

When you lose weight, your body burns fewer calories at rest than expected for your new size. This 'metabolic adaptation' means you have to eat even less than you think to maintain your weight, making regain easier if you return to old habits.

Daily supplementation with natto-derived menaquinone-7 (MK-7) at doses of 50 µg or higher significantly interferes with oral anticoagulant therapy (specifically acenocoumarol) by reducing the INR, whereas synthetic vitamin K1 requires much higher doses (≥315 µg/d) to produce a similar clinical effect.

If you take oral anticoagulants like acenocoumarol or warfarin, avoid MK-7 (natto-derived) supplements above 50 µg/day as they can dangerously lower your INR. Synthetic Vitamin K1 is less likely to interfere at standard doses (<100 µg), but consult your hematologist before starting any Vitamin K supplement.

Oral L-arginine supplementation (21g/day for 4 weeks) improves endothelium-dependent dilation in young adults with hypercholesterolemia.

If you are a young adult with high cholesterol, taking 21 grams of L-arginine daily for a month may help improve your blood vessel flexibility (endothelial function). This benefit is specific to those with elevated cholesterol; it does not lower cholesterol itself. Be aware that high doses can cause stomach upset, so monitor your tolerance.

Combined vitamin D (300-1100 IU/d) and calcium (500-1200 mg/d) supplementation reduces fracture risk in older adults, with significant benefit in institutionalized settings but negligible benefit in community-dwelling populations.

For elderly individuals, especially those in care facilities, taking a combination of Vitamin D (300-1000 IU) and Calcium (500-1200 mg) daily can significantly lower the risk of breaking a bone. However, for healthy, community-dwelling older adults, this combination may not provide a statistically significant benefit over placebo. Consult a doctor to determine if you fall into the high-risk institutional category or if dietary sources suffice.

Adherence to a dietary pattern aligned with WHO chronic disease prevention guidelines is associated with a 13% lower risk of all-cause mortality over 20 years in men aged 50-70, independent of smoking and alcohol consumption.

For men over 50, focusing on a balanced diet that limits saturated fats and cholesterol while increasing fiber, fruits, vegetables, and healthy fats is associated with a significantly lower risk of death over two decades. This benefit holds true across different cultural backgrounds, suggesting that the overall pattern of eating is more important than any single food.

Oral creatine supplementation increases muscle phosphocreatine content by approximately 20%, which enhances performance specifically during short-duration, high-intensity, repeated exercise bouts, but does not improve maximal isometric strength, rate of force production, or aerobic exercise performance.

If you perform short, explosive activities (like sprinting or weightlifting) with brief rest periods, creatine can help you maintain power output across multiple sets. Take 3 grams daily; you do not need to 'load' with 20 grams unless you want faster saturation. Do not expect it to help your long-distance running or increase your one-rep max directly. Stay hydrated, as it causes water retention.

Creatine supplementation leads to rapid weight gain (1-3 kg) in the first few days due to water retention in muscle, which is distinct from muscle hypertrophy caused by strength training.

Expect to see the scale go up by 1-3 kg in the first week. This is water weight inside the muscle, not fat or muscle tissue. It is a normal part of the loading process and does not indicate 'bloating' in a negative health sense.

Oral administration of Akkermansia muciniphila (2x10^8 bacterial cells/day) reverses high-fat diet-induced obesity and metabolic disorders in mice by improving gut barrier function and lipid metabolism without altering food intake.

If you are struggling with obesity or metabolic issues, increasing your levels of Akkermansia muciniphila through diet (prebiotic fibers, polyphenols) or supplementation may help improve your gut barrier and lipid metabolism. Note that this benefit is most pronounced if you have existing metabolic disorders like those induced by a high-fat diet.

Akkermansia muciniphila abundance is inversely correlated with obesity and metabolic syndrome severity in humans, and its enrichment can serve as an indicator of metabolic health.

Monitoring your gut microbiome for Akkermansia muciniphila levels could be a useful indicator of your metabolic health. Higher levels are generally associated with better metabolic outcomes.

Dietary interventions, including calorie restriction, prebiotic fibers, and polyphenols, increase the abundance of Akkermansia muciniphila in the gut.

To boost your Akkermansia muciniphila levels, focus on a diet rich in prebiotic fibers, incorporate polyphenol-rich foods (like cranberry, pomegranate, tea), and consider calorie restriction if you are overweight.

Obesity induces chronic low-grade systemic inflammation through adipose tissue-derived cytokines (such as TNF-α, IL-6, and CRP), which accelerates atherosclerosis and increases the risk of cardiovascular disease.

If you have excess body fat, particularly around your midsection, your fat tissue is actively releasing inflammatory chemicals that damage your blood vessels and increase heart disease risk. Managing weight and reducing visceral fat can help lower this chronic inflammation and protect your cardiovascular health.

Obese individuals exhibit increased fasting gastric volume and delayed satiation, allowing them to consume significantly more calories before reaching maximum satiation compared to normal-weight individuals.

If you struggle with obesity, your stomach may physiologically require more food to signal fullness (satiation) than a normal-weight person. This is not a character flaw but a physiological difference in fasting gastric volume and satiety signaling. Understanding this can help in managing expectations and potentially targeting therapies that enhance satiety signals.

Obesity contributes to OSAS pathogenesis by causing upper airway narrowing due to fat deposition in the pharynx and thoracic cavity, reducing vital capacity, and altering ventilation-perfusion ratios.

Losing weight can mechanically open your airway by reducing fat deposition in the neck and pharynx. This is a primary treatment strategy for OSAS, especially if you are overweight.

Maintaining mitochondrial dynamics (balance of fission and fusion) and quality control (mitophagy/biogenesis) is critical for preventing age-related metabolic diseases and neurodegeneration.

Support mitochondrial quality control through regular physical activity, which naturally stimulates mitophagy and biogenesis. Focus on metabolic health (insulin sensitivity) to support the energy demands of these processes.

Higher dietary intake of calcium (≥800 mg/day) and magnesium (≥300 mg/day) is independently associated with a significantly lower risk of developing hypertension in women compared to low intake levels.

To support healthy blood pressure, aim for at least 800 mg of calcium and 300 mg of magnesium daily through food sources like dairy, fruits, vegetables, and cereals. This is particularly relevant for women, as higher intakes of these specific minerals are linked to a lower risk of developing high blood pressure, independent of weight and alcohol consumption.

Increasing taste intensity (e.g., saltiness) while maintaining palatability reduces meal intake by approximately 9% through enhanced satiation, independent of how much the food is liked.

Enhance the taste intensity of your meals (e.g., using herbs, spices, or appropriate salt levels) without necessarily increasing calories. Stronger tastes can signal nutrient presence and increase satiation, helping you stop eating sooner.

PPARgamma activation via thiazolidinediones (TZDs) like rosiglitazone and pioglitazone induces a metabolically beneficial shift in lipid repartitioning from visceral and ectopic storage (liver, muscle) to subcutaneous adipose tissue.

If you are prescribed a TZD (like pioglitazone) for diabetes, understand that any weight gain is likely shifting from dangerous visceral/organ fat to safer subcutaneous fat, which is metabolically protective.

PPARgamma activation promotes the browning of white adipose tissue (beige adipocytes) and enhances brown adipose tissue (BAT) function, leading to increased energy expenditure and thermogenesis.

Activating brown fat through cold exposure or potentially PPARgamma-activating strategies can boost calorie burning via thermogenesis.

Concomitant administration of recombinant human growth hormone (rhGH) prevents the protein catabolic effects of pharmacologic doses of the glucocorticoid prednisone in healthy adults.

If you are taking high-dose prednisone for a medical condition, you may experience muscle loss. This research suggests that adding human growth hormone (rhGH) can stop this muscle breakdown. However, this study was done on healthy young adults, not patients with chronic diseases, so do not attempt this without strict medical supervision.

Adults consuming plant-based diets (vegetarian/vegan) have significantly lower intake and status of Vitamin B12, Vitamin D, Iron, Zinc, Iodine, and Calcium compared to meat-eaters, with vegans showing the lowest levels for B12, Calcium, and Iodine.

If you follow a plant-based diet, you must actively manage your intake of Vitamin B12, Iron, Zinc, Calcium, and Iodine. These nutrients are significantly lower in plant-based diets compared to meat-eaters, especially for vegans. Do not assume plant sources are equivalent; utilize fortified foods, diverse plant sources, and consider supplementation (especially B12) to meet recommended levels.

Plant-based diets provide higher intake of Fiber, Polyunsaturated Fatty Acids (PUFA), Folate, Vitamin C, Vitamin E, and Magnesium compared to meat-eaters.

If you eat a plant-based diet, you are likely getting excellent amounts of Fiber, Folate, and Magnesium. Ensure you are eating enough PUFA-rich foods (nuts, seeds, oils) to maximize these benefits. This is a key advantage of plant-based eating over typical meat-heavy diets.

Vegans and vegetarians have significantly lower intake and status of EPA and DHA compared to meat-eaters, despite potentially higher ALA intake.

If you are vegan or vegetarian, your EPA and DHA levels are likely low, even if you eat flax or walnuts. Consider an algae-based Omega-3 supplement to ensure adequate EPA and DHA intake, as these are critical for health and are not adequately produced from plant ALA.