Browse the evidence

Acute ingestion of 10g inulin-propionate ester increases postprandial PYY and GLP-1 levels and reduces energy intake by approximately 14% in healthy adults.

Taking 10g of this specific propionate ester with a meal can help you eat less during that meal by triggering fullness hormones. This effect happens about 4 hours after ingestion when the propionate reaches the colon.

Self-efficacy is the most consistent predictor of physical activity initiation and long-term maintenance in older adults.

Believe in your ability to exercise. Your confidence in your own capabilities is the biggest factor in whether you will start and stick with exercise. Build this confidence by starting with small, achievable goals, succeeding, and seeing others like you succeed.

Short-chain fatty acids (SCFAs), particularly butyrate, acetate, and propionate, produced by gut microbiota fermentation of dietary carbohydrates, provide significant caloric energy to the host and exert anti-inflammatory effects by promoting intestinal epithelial integrity and inducing regulatory T cells.

Prioritize dietary fibers and complex carbohydrates that reach the colon, as these are fermented by gut bacteria into short-chain fatty acids (SCFAs) like butyrate. These SCFAs are not just waste products; they provide about 10% of your body's energy needs, strengthen your gut lining, and help regulate inflammation. A diverse diet rich in fibers supports this beneficial microbial activity.

Excessive protein fermentation by gut microbiota can produce toxic metabolites such as hydrogen sulfide, ammonia, and certain amines, which may damage the intestinal epithelium, promote inflammation, and are associated with diseases like inflammatory bowel disease (IBD).

Be mindful that very high protein intakes, especially without adequate fiber, may lead to the production of potentially harmful byproducts like hydrogen sulfide and ammonia by gut bacteria. This is particularly relevant for individuals with gut sensitivities or inflammatory conditions. Balancing protein intake with fiber-rich foods can help maintain a healthier microbial balance.

In older adults, the rate of strength loss (dynapenia) is 2-5 times faster than the rate of muscle mass loss (sarcopenia), making strength a more consistent predictor of disability and mortality than muscle mass alone.

As you age, prioritize strength training over just building muscle size. Your muscles may shrink slowly, but your ability to generate force declines much faster. Focus on maintaining or increasing your strength (e.g., through resistance training) to preserve independence and reduce mortality risk, as strength is a better predictor of health outcomes than muscle mass alone.

Adequate selenium intake is essential for optimal human health, primarily through its incorporation into selenoproteins, and deficiency is linked to increased risks of cancer, infection, male infertility, and neurologic conditions.

Ensure your diet provides adequate selenium, as it is crucial for thyroid function, immune health, and antioxidant defense. Good sources include Brazil nuts, seafood, and meat. Avoid high-dose supplementation unless advised by a doctor, as too much selenium can be toxic and cause oxidative damage. If you live in an area with selenium-poor soil, consider your dietary sources carefully.

Rate of force development (RFD) in the early phase of a rapid contraction (first 50–75 ms) is primarily determined by neural factors, specifically the capacity for maximal voluntary activation and increased motor unit discharge rate, rather than intrinsic muscle contractile properties.

To improve how quickly you generate force, focus on training your nervous system to activate muscles faster, not just making them bigger. This involves explosive movements and high-velocity training to increase motor unit discharge rates, especially in the first 50-75 milliseconds of effort.

Intrinsic muscle properties (such as fiber type and contractile speed) become the primary determinant of Rate of Force Development (RFD) in the later phases of a rapid contraction (>75 ms), whereas neural factors dominate the early phase.

If your movement lasts longer than 75 milliseconds, your muscle's physical properties (like fiber type and size) matter more for speed than your initial neural burst. Maximal strength (MVC) becomes a stronger predictor of force output as the contraction progresses.

Daily intake of 2 grams or more of combined EPA and DHA is required to elicit measurable anti-inflammatory effects in adult humans.

To potentially reduce inflammation, you likely need to consume more than 2 grams of combined EPA and DHA daily. Standard fish oil capsules often contain less than this amount, so you may need to adjust your supplement intake or choose concentrated formulations to reach this threshold.

Fish oil supplementation shows consistent benefit in Rheumatoid Arthritis (RA) but inconsistent or unclear efficacy in Inflammatory Bowel Disease (IBD) and Asthma.

If you have Rheumatoid Arthritis, fish oil supplementation may offer benefits supported by meta-analyses. However, if you are using it for IBD or Asthma, current clinical evidence does not clearly support its efficacy, and results are inconsistent.

Resistance training has particularly pronounced effects on executive function, memory, and working memory in older adults.

Incorporate strength training into your routine to boost memory and decision-making skills. You don't need heavy weights; bodyweight exercises or light machines work. Focus on consistency. This is especially important for keeping your mind sharp as you age.

Living in urban areas with accessible, walkable green spaces (parks, tree-lined streets) significantly increases five-year survival rates in senior citizens, independent of age, sex, socioeconomic status, and baseline functional status.

For seniors in cities, prioritize living near or having easy access to parks and tree-lined streets. This environmental factor is independently linked to living longer, likely by encouraging walking and physical activity. Urban planning that prioritizes walkable green infrastructure is a critical public health strategy for aging populations.

Supplementation with EPA and DHA (2.7 g/day EPA) reduces the production of pro-inflammatory eicosanoids (like PGE2) and cytokines (TNF-alpha, IL-1beta) by altering cell membrane phospholipid composition and inhibiting NF-kB activation.

To reduce inflammation, standard fish oil doses may be insufficient. Research suggests a threshold of approximately 2.7 grams of EPA per day is needed to significantly lower inflammatory markers like PGE2. This is higher than typical dietary intake. For conditions like RA, this dosage has shown clinical benefits like reduced stiffness and pain.

Adipose tissue expression of tumor necrosis factor (TNF) increases with obesity and decreases significantly with weight loss, correlating inversely with lipoprotein lipase (LPL) activity.

Weight loss reduces the production of TNF, a hormone-like substance in fat tissue that promotes fat storage by inhibiting LPL. This suggests that as you lose weight, your body's biological resistance to storing fat decreases, potentially making further weight loss easier, although other factors also regulate fat storage.

Adequate intake of specific micronutrients (Vitamins A, D, C, E, B6, B12, folate, zinc, iron, copper, selenium) is essential for maintaining the structural and functional integrity of the immune system, and marginal deficiency impairs immunity.

Ensure your diet provides adequate levels of key immune-supporting micronutrients (Vitamins A, D, C, E, B6, B12, folate, zinc, iron, copper, selenium). If you have increased requirements due to stress, infection, or pollution, or if your diet is lacking, consider supplementation as these nutrients play vital roles in immune function.

High-volume, intense exercise training and competition are associated with transient immune dysfunction and an increased risk of upper respiratory tract infections (URTI).

If you are training for a marathon or competing in endurance events, be aware that your risk of getting sick spikes in the days following the event. Prioritize recovery, sleep, and nutrition immediately after heavy exertion to mitigate this risk.

Selenium status is a critical determinant of health outcomes, with deficiency linked to specific diseases (Keshan, Kashin-Beck) and toxicity causing adverse effects, while optimal intake supports antioxidant defense and thyroid function.

Selenium is essential for health, particularly for antioxidant defense and thyroid function. However, because the margin between beneficial and toxic intake is narrow, you should prioritize obtaining selenium from food sources (meat, fish, eggs, cereals) rather than high-dose supplements unless advised by a doctor based on your specific status or geographic location (e.g., low-selenium soil regions).

Selenium deficiency is causally linked to Keshan disease (endemic cardiomyopathy) and potentially Kashin-Beck disease (osteoarthropathy), particularly in regions with low soil selenium.

If you live in a region known for low soil selenium (like parts of China or the UK), ensuring adequate selenium intake through diet or targeted supplementation may be crucial to prevent specific deficiency-related diseases like Keshan disease.

A Body Shape Index (ABSI), calculated as waist circumference adjusted for height and BMI, independently predicts increased mortality hazard, whereas BMI and waist circumference alone do not show significant independent predictive power when ABSI is accounted for.

To assess your mortality risk more accurately than using BMI or waist circumference alone, calculate your A Body Shape Index (ABSI). ABSI is calculated by dividing your waist circumference (in meters) by the product of your BMI (to the power of 2/3) and your height (to the power of 1/2). A higher ABSI indicates a higher relative risk of mortality, independent of your overall weight. This metric is particularly useful for distinguishing between the risks of high visceral fat and high muscle mass.

A modest reduction of 1 g of salt per day, achieved gradually, is still cost-saving and reduces cardiovascular events, making it a viable long-term public health target.

You don't need to eliminate salt to see benefits. A modest reduction of 1 gram per day, achieved gradually over time, is still cost-saving for the healthcare system and reduces heart disease and stroke risk. Focus on small, sustainable changes to your diet, particularly reducing processed foods.

SGLT2 inhibitors (e.g., Dapagliflozin) lower blood glucose by preventing renal glucose reabsorption, resulting in reduced HbA1c, fasting plasma glucose, blood pressure, and body weight.

SGLT2 inhibitors like Dapagliflozin are a newer class of diabetes medication that work by removing excess sugar through urine. This process helps lower blood sugar, blood pressure, and body weight. While effective, they carry a risk of genital infections and potentially breast or bladder cancer, requiring monitoring.

GLP-1 receptor agonists (e.g., Exenatide, Liraglutide, Lixisenatide) lower HbA1c, promote weight loss, and reduce hypoglycemia risk by stimulating insulin secretion and increasing satiety.

GLP-1 receptor agonists are injectable medications that help lower blood sugar, promote weight loss, and reduce the risk of hypoglycemia. They work by mimicking a hormone that increases insulin, decreases glucagon, and makes you feel full. They are effective for both weight loss and glycemic control, with similar safety profiles in elderly and younger patients.

Acute administration of glucose (oral or intravenous) and food intake causes a significant decrease in plasma ghrelin concentrations, reaching a nadir of approximately 66-69% of basal levels, indicating ghrelin reflects acute feeding state.

Eating food, particularly carbohydrates, triggers a rapid drop in ghrelin (the hunger hormone). This is a metabolic signal, not just a result of your stomach being physically full. Water alone does not trigger this hormonal drop, suggesting that nutrient content is key to hormonal satiety.

Habitually sleeping 5 hours or less per night significantly increases the risk of developing hypertension in adults aged 32-59, independent of obesity and diabetes.

If you are between 32 and 59 years old, consistently sleeping 5 hours or less a night puts you at double the risk of developing high blood pressure compared to sleeping 7-8 hours. This risk exists even if you are not overweight or diabetic. Prioritize getting 7-8 hours of sleep to protect your cardiovascular health.