Browse the evidence

Oral hypersensitivity to fatty acids is associated with lower habitual energy and fat intake, lower BMI, and superior ability to rank foods by fat content in human subjects.

Your ability to taste fat in food may influence how much you eat. People who are more sensitive to the taste of fat tend to eat less fat and have lower body weight. While you cannot directly 'take' sensitivity, understanding that your taste buds play a role in regulating intake might help you leverage this natural feedback loop when choosing foods.

Prior resistance exercise-induced hypertrophy creates an epigenetic memory in human skeletal muscle, evidenced by sustained DNA hypomethylation of specific genes (e.g., AXIN1, GRIK2, UBR5) during detraining, which facilitates a significantly greater hypertrophic response upon subsequent reloading compared to the initial training phase.

If you have trained before, stopped, and are starting again, your muscles may respond faster than when you first started. This is due to epigenetic changes (DNA methylation) that persist even after muscle mass returns to baseline. To leverage this, ensure your initial training phase was substantial enough to induce hypertrophy, as this creates the 'memory' that accelerates reloading gains.

Administration of specific probiotic strains (e.g., Lactobacillus, Bifidobacterium, Saccharomyces) improves gastrointestinal health outcomes, including reducing the duration of acute diarrhea, preventing antibiotic-associated diarrhea, and alleviating symptoms of irritable bowel syndrome (IBS).

If you are looking to use probiotics for digestive issues like diarrhea or IBS, do not just buy any probiotic. Look for specific strains like Lactobacillus rhamnosus GG or Saccharomyces boulardii, which have evidence for diarrhea. Take them 1-10 billion CFUs, 1-2 times daily. If you are taking antibiotics, wait two hours after the antibiotic before taking the probiotic. Results vary by individual, so track your symptoms.

Tocotrienols (specifically gamma and delta forms) exhibit superior antioxidant, anti-inflammatory, and anticancer properties compared to alpha-tocopherol, primarily due to their unsaturated isoprenoid side chain enabling better tissue penetration and unique metabolic pathways.

Consider incorporating tocotrienol-rich sources (like palm oil or rice bran oil) or supplements, particularly if you are concerned about inflammation or cancer risk, as they may offer protective benefits that standard Vitamin E (alpha-tocopherol) does not. Note that human clinical data is still emerging, so this is a supportive strategy rather than a primary treatment.

Using a sociable robotic weight loss coach significantly increases long-term behavioral adherence (tracking duration) compared to computer-based or paper-based tracking systems, without necessarily producing superior short-term weight loss.

To stick with a weight loss plan longer, use a tool that feels socially engaging. This study suggests that a robot coach that talks to you, tracks your progress, and builds a relationship helps you keep going for months longer than a simple paper log or a silent computer program. The key is the social connection, not just the data entry.

Two nights of partial sleep deprivation (approx. 4 hours sleep opportunity) significantly decreases fasting and postprandial insulin sensitivity in normal-weight young men, while simultaneously altering gut microbiota composition by increasing the Firmicutes:Bacteroidetes ratio and the abundance of Coriobacteriaceae and Erysipelotrichaceae.

If you are a healthy young adult, restricting your sleep to ~4 hours for two consecutive nights will likely impair your body's ability to handle glucose (insulin sensitivity) and shift your gut bacteria towards profiles often seen in metabolic disorders. While the gut changes might not directly cause the insulin resistance, the metabolic risk is real. Prioritize getting 7-9 hours of sleep to maintain metabolic health.

Resistance training induces functional brain changes, particularly in the frontal lobe, which are associated with improvements in executive functions.

To support brain health and executive function, incorporate resistance training into your routine. This type of exercise has been shown to cause functional changes in the frontal lobe and reduce white matter atrophy, which are linked to better cognitive performance, especially in older adults.

Gains in dynamic muscular strength mediate improvements in global cognitive performance and executive functions.

Improving your muscular strength through resistance training can directly boost your cognitive performance and executive functions, suggesting that physical strength is a key driver of brain health.

Dietary prebiotics (non-digestible carbohydrates) improve leptin sensitivity and reduce food intake in diet-induced obesity by modulating gut microbiota to increase short-chain fatty acid (SCFA) production, which activates GPR41/43 receptors and reduces low-grade inflammation.

If you are struggling with leptin resistance (common in obesity), consider increasing your intake of prebiotic fibers (like inulin-type fructans or resistant starch). These feed gut bacteria to produce SCFAs, which help restore your body's sensitivity to leptin, potentially reducing hunger and improving metabolic health. This is a dietary strategy to reset hormonal signaling rather than just adding bulk.

Gut microbiota-derived short-chain fatty acids (SCFAs), specifically propionate, improve insulin sensitivity and glucose homeostasis by stimulating intestinal gluconeogenesis via the GPR43 receptor and a gut-brain neural circuit.

Consuming prebiotic fibers that generate propionate (a type of SCFA) can help improve your body's ability to manage blood sugar. This happens through a communication pathway between your gut and brain. Focus on foods rich in resistant starches and inulin to support this natural glucose-regulating mechanism.

Gut microbiota composition influences the secretion of anorexigenic gut peptides (GLP-1 and PYY) and reduces orexigenic ghrelin, thereby reducing food intake and body weight, mediated by microbial fermentation of non-digestible carbohydrates.

To naturally reduce hunger, incorporate prebiotic fibers (like those in onions, garlic, bananas, or supplements like inulin) into your diet. These fibers feed gut bacteria that produce SCFAs, which in turn stimulate the release of satiety hormones (GLP-1, PYY) and reduce hunger hormones (ghrelin), helping you feel full longer.

Exercise interventions for hip or knee osteoarthritis improve self-efficacy and slightly reduce depression, but have little to no effect on anxiety.

Exercise can help boost your confidence in managing your condition and may slightly reduce depressive symptoms. However, do not expect exercise to significantly alleviate anxiety. Focus on the physical and confidence-building benefits.

Dietary fiber intake modulates gastrointestinal transit time, which serves as a key mechanism for improving glucose homeostasis and reducing the risk of metabolic diseases like obesity and type 2 diabetes.

Increase your intake of dietary fibers from various plant sources (whole grains, vegetables, legumes) to support healthy gastrointestinal transit. This can help regulate blood sugar levels and may reduce the risk of metabolic diseases. Start gradually to minimize digestive discomfort.

Viscous soluble fibers (e.g., beta-glucans, pectin, psyllium) delay gastric emptying, which contributes to reduced postprandial glucose concentrations and improved insulin sensitivity.

Incorporate viscous soluble fibers like beta-glucans (oats), pectin (apples), or psyllium into your meals. These can help slow down digestion, leading to more stable blood sugar levels after eating. Ensure adequate water intake when consuming these fibers.

Women with PCOS should be assessed for cardiovascular disease risk factors, including lipid profiles and blood pressure, regardless of age or BMI, due to increased risk of cardiovascular disease and mortality.

If you have PCOS, get your cholesterol and blood pressure checked at diagnosis and annually thereafter, even if you are young and have a healthy weight. This is standard care for PCOS, not optional.

Higher levels of habitual physical activity are associated with lower intrahepatic fat (IHF) content in humans, independent of BMI, insulin resistance, and adiponectin levels.

If you want to reduce liver fat, regular physical activity is a key tool, independent of your weight. This study used a validated questionnaire to measure habitual activity (work, sport, leisure) and found that those with the highest activity levels had significantly lower liver fat. You don't need to be an elite athlete; consistent engagement in sports and leisure-time physical activity (like walking or cycling) is associated with healthier liver fat levels.

High adherence to the Mediterranean diet is associated with lower Escherichia coli counts, a higher Bifidobacteria:E. coli ratio, increased Candida albicans levels, and greater acetate molar ratios in the gut microbiota.

Adhering closely to a Mediterranean diet pattern (high in plants, olive oil, fish; low in red meat/sweets) shifts your gut microbiota to favor beneficial ratios (Bifidobacteria/E. coli) and increase beneficial short-chain fatty acids like acetate. Note that this shift may initially increase gastrointestinal symptoms like bloating or pain, which the study observed as more pronounced in high adherers.

Consumption of snacks and junk food is negatively associated with beneficial gut bacteria (Lactobacilli, butyrate-producers) and positively associated with E. coli and coliforms.

High consumption of snacks and junk food is linked to a gut microbiota profile with fewer beneficial bacteria (like Lactobacilli and butyrate-producers) and higher levels of E. coli and coliforms. Reducing these foods may support a healthier microbial balance.

Dietary polyphenols (curcumin, quercetin, catechins) ameliorate metabolic disorders by being metabolized by gut microbiota into bioactive phenolic metabolites, which in turn modulate gut microbiota composition to favor beneficial bacteria and reduce pathogenic ones.

To get metabolic benefits from polyphenols like curcumin, quercetin, and catechins, focus on consistent dietary intake rather than expecting immediate high absorption. Your gut bacteria will process these compounds into active metabolites that help regulate inflammation and metabolic health. Diversity in your diet supports the microbial diversity needed for this conversion.

Curcumin administration improves metabolic health in obese/diabetic models by modulating gut microbiota to reduce inflammation and improve intestinal barrier function.

If you consider curcumin, understand that its benefit may come more from its interaction with your gut bacteria than direct absorption. It may help with insulin sensitivity and gut barrier integrity, especially if you have metabolic issues. Formulations that enhance bioavailability (like with piperine or lipids) may be more effective.

Quercetin supplementation reduces inflammation and improves metabolic parameters (glucose, lipids) by modulating gut microbiota composition, specifically by increasing beneficial bacteria and reducing pathogenic ones.

Quercetin, found in onions, apples, and tea, may help manage blood sugar and lipids by supporting healthy gut bacteria. Regular dietary intake is a practical way to leverage these effects.

Administration of probiotics, prebiotics, or synbiotics can improve insulin sensitivity and glucose metabolism in humans, primarily through mechanisms involving short-chain fatty acid (SCFA) production, modulation of gut microbiota composition, and reduction of systemic inflammation.

If you have insulin resistance or type 2 diabetes, consuming specific probiotic strains (like Lactobacillus and Bifidobacterium combinations) or prebiotics (like inulin or FOS) may help improve your blood sugar control. However, results are not guaranteed and depend heavily on the specific strain and dose used. It is not a substitute for standard medical care but may be a useful adjunct.

Probiotic supplementation can reduce systemic inflammation and oxidative stress, which are contributors to insulin resistance, by lowering pro-inflammatory cytokines and increasing antioxidant enzyme activity.

Some probiotic supplements may help lower chronic inflammation and oxidative stress in people with diabetes, which can indirectly support better insulin sensitivity.

Population-wide physical activity interventions, specifically pedometer programs and mass media campaigns, are dominant (cost-saving) and highly cost-effective strategies for improving public health outcomes.

To maximize health benefits and save money, prioritize low-friction, high-reach interventions. Use a pedometer to track steps (aiming for 10,000) and engage with community mass media campaigns. Avoid expensive, high-friction options like frequent travel to exercise physiologists, which offer poor value for the health outcome achieved.