Browse the evidence

Marine omega-3 fatty acids (EPA and DHA) reduce the risk of cardiovascular disease, particularly coronary heart disease and sudden cardiac death, primarily through secondary prevention in high-risk patients (e.g., post-myocardial infarction), while evidence for primary prevention in healthy populations remains weak or inconclusive.

If you have heart disease or have had a heart attack, taking 840mg of EPA+DHA daily is a well-supported strategy to reduce mortality. If you are healthy and have no heart disease, taking omega-3 supplements is unlikely to prevent a heart attack, though it may offer other minor benefits. Focus on diet (fatty fish) rather than supplements for primary prevention.

Sarcopenia is associated with an increased risk of cardiovascular-specific mortality in females, but not in males.

For older women, sarcopenia is a specific warning sign for heart-related death. If you are a woman with low muscle mass and slow walking speed, you should be particularly vigilant about your cardiovascular health, as your risk is significantly higher than men with the same condition.

Knee immobilization causes a disproportionate loss of strength (47%) compared to muscle fiber atrophy (11%), primarily due to reduced neural activation.

After immobilization, expect your strength to be much lower than your muscle size would suggest. This is normal and due to neural 'de-conditioning,' not just muscle loss. Focus on relearning movement patterns and neural drive through resistance training, as strength will return faster than muscle size.

Psychomotor vigilance performance recovers during sleep in a saturating exponential manner with a time constant of approximately 2.14 hours, meaning the first few hours of sleep provide disproportionate recovery benefits compared to later hours.

If you are sleep-deprived, prioritize getting at least 2 hours of sleep. Your cognitive performance (reaction time, vigilance) recovers most rapidly during these first few hours. Extending sleep beyond 5-8 hours yields diminishing returns for immediate performance recovery, so focus on getting that initial rest rather than stressing about perfect 8-hour durations if you are short on time.

Sarcopenia (low skeletal muscle mass) is a strong, independent predictor of increased overall and colorectal cancer-specific mortality in early-stage colorectal cancer patients, regardless of BMI.

If you have colorectal cancer, ask your medical team to assess your muscle mass using your CT scans. Maintaining muscle mass (avoiding sarcopenia) is critical for survival, even more so than your total body weight or BMI. Focus on preserving muscle through appropriate nutrition and activity as tolerated, rather than just tracking the scale.

High adiposity (specifically visceral adipose tissue) is associated with increased mortality risk in women with early-stage colorectal cancer, but this association is not significant in men.

For women with colorectal cancer, high levels of body fat (especially visceral fat) may increase mortality risk, unlike in men. This suggests that women might benefit from specific attention to body composition, ensuring adequate muscle mass while managing adiposity, rather than just focusing on weight.

High acute myofibrillar protein synthesis (MyoPS) immediately following resistance training does not predict muscle hypertrophy when muscle damage is high; hypertrophy is instead correlated with attenuated MyoPS responses that occur after muscle damage has subsided.

Do not chase high muscle soreness or assume the biggest spike in protein synthesis after your first few workouts means you are building the most muscle. In the early weeks of a new program, high protein synthesis is largely used to repair damage, not build size. True hypertrophy correlates with later training phases (after ~3 weeks) where muscle damage has decreased, allowing protein synthesis to be directed toward fiber growth. Focus on consistent training rather than maximizing acute post-workout spikes or soreness.

Obesity (BMI ≥ 30 kg/m²) is a primary driver of increased mortality risk, with relative risk of death increasing in a nonlinear manner as BMI rises.

Maintaining a healthy body weight is not just about appearance; it is a critical factor in longevity. The risk of death rises sharply as BMI increases, particularly above 30 kg/m². Prioritizing weight management through sustainable lifestyle changes is one of the most effective actions to reduce the risk of chronic diseases like diabetes, heart disease, and cancer.

Obesity is a major risk factor for coronary heart disease (CHD), with susceptibility increasing 2-3 times in obese adults.

Being overweight significantly increases your risk of coronary heart disease, making you 2-3 times more susceptible than those at a healthy weight. This is a major contributor to heart-related deaths. Managing your weight is a key strategy to protect your heart health.

Obesity is a significant risk factor for various cancers, with obese adults being 40% more likely to die from cancer than non-obese individuals.

Being overweight increases your risk of dying from cancer by 40%. This is particularly true for cancers of the breast, endometrium, colon, and kidney. Maintaining a healthy weight is one of the most effective ways to reduce your cancer risk, especially if you do not smoke.

Germination of legumes and seeds significantly increases their melatonin content (up to 400% increase in soybeans and 11-fold in mung beans) compared to their raw state.

Sprout your legumes and seeds (like soybeans and mung beans) before eating them. Germination can increase melatonin content by up to 400% in soybeans and 11-fold in mung beans, maximizing the hormonal and antioxidant benefits of these foods.

Low-load blood flow restriction (LL-BFR) training produces muscle hypertrophy comparable to high-load (HL) resistance training in older adults, though it yields lower strength gains.

Older adults who cannot or should not lift heavy weights can still build muscle mass by using low-load resistance training combined with blood flow restriction (BFR). While this method builds muscle similarly to heavy lifting, it does not increase strength as much as heavy lifting does. It is a safe and effective option for maintaining muscle mass, especially for those with joint issues or comorbidities.

Critically ill patients lose approximately 2% of skeletal muscle mass per day during the first week of ICU admission, with rectus femoris thickness decreasing by 1.75% and cross-sectional area by 2.10% daily.

If you or a loved one is in the ICU, expect rapid muscle loss (approx. 2% per day) starting immediately. This is driven by inflammation, immobility, and metabolic stress. While you cannot stop the illness, early mobilization (as tolerated) and adequate protein intake are critical to slowing this specific rate of tissue breakdown.

Supplementation with marine long-chain omega-3 fatty acids (EPA/DHA) reduces the risk of cardiovascular events, cardiac death, and coronary events in individuals with high cardiovascular risk.

If you are at high risk for cardiovascular disease, taking marine omega-3 supplements (EPA/DHA) in addition to your standard medical treatment can reduce your risk of heart events, heart-related death, and coronary issues. Aim for a daily intake consistent with clinical guidelines (often around 1g EPA/DHA for those with coronary disease), but consult your doctor to determine the right dose for your specific condition.

Short sleep duration (<6 hours) is significantly associated with higher body mass index, unmarried status, and poorer physical and mental health scores, suggesting it acts as a marker for adverse lifestyle and comorbidities rather than a direct causal risk factor.

If you sleep less than 6 hours, look at your lifestyle and health context, not just the clock. This study shows short sleep is strongly linked to being unmarried, having a higher BMI, and reporting poorer physical/mental health. Instead of stressing about sleep itself, address these underlying factors: manage stress, maintain a healthy weight, and check for underlying health issues. Sleep duration here acts as a signal of broader life stressors.

In patients with nonalcoholic fatty liver disease (NAFLD), sarcopenia (defined by a low sarcopenia index of appendicular skeletal muscle mass relative to BMI) is independently associated with a significantly higher risk of significant liver fibrosis, regardless of obesity or insulin resistance levels.

If you have fatty liver disease, your muscle mass matters for your liver health. Low muscle mass (sarcopenia) is linked to a significantly higher risk of serious liver scarring (fibrosis), independent of how much you weigh or your insulin levels. You should prioritize resistance training and adequate protein intake to preserve muscle, not just weight loss, as this may help mitigate liver fibrosis risk.

Elevated tissue omega-3 fatty acid levels reduce metabolic endotoxemia and systemic inflammation by upregulating intestinal alkaline phosphatase (IAP), which modifies gut microbiota to decrease lipopolysaccharide (LPS) production and gut permeability.

To reduce chronic low-grade inflammation, focus on balancing your omega-6 to omega-3 ratio rather than just taking high doses of supplements. High omega-3 levels in your tissues trigger the production of Intestinal Alkaline Phosphatase (IAP), which cleans up gut bacteria that cause inflammation. This suggests that gut health is a critical lever for managing systemic inflammation, and improving your fatty acid balance supports this natural defense mechanism.

Four weeks of oral supplementation with Lactobacillus acidophilus NCFM preserves insulin sensitivity in subjects with normal glucose tolerance, impaired glucose tolerance, or type 2 diabetes compared to placebo, without affecting systemic inflammatory markers.

Taking 1 gram of Lactobacillus acidophilus NCFM daily for four weeks may help maintain insulin sensitivity in individuals with normal glucose tolerance, impaired glucose tolerance, or type 2 diabetes. This benefit occurs independently of changes in systemic inflammation, suggesting the mechanism is specific to this strain and not a general anti-inflammatory effect of probiotics.

Physical inactivity, including immobilization and sedentary lifestyle, leads to a reversal of training adaptations, resulting in reduced muscle mass, decreased oxidative capacity, and increased fatigability.

If you experience a period of inactivity due to injury or a sedentary lifestyle, be aware that your muscle adaptations may decrease. To mitigate this, try to maintain some level of physical activity, even if it's reduced, to preserve muscle mass and oxidative capacity.

Age-related declines in explosive strength and power are greater than the declines in maximal isometric strength.

As you age, your ability to generate power drops faster than your ability to generate maximal force. To stay functional and prevent falls, you must train for speed and power, not just maximal strength. This means incorporating explosive movements with appropriate loads, even if your maximal strength remains relatively preserved.

High antagonist muscle activation in elderly men limits movement efficiency and may contribute to reduced power output.

Older adults often have higher antagonist muscle activity, which can reduce movement efficiency. Training that focuses on smooth, controlled movements and reducing unnecessary tension in opposing muscles may help improve power output and functional performance.

High-load resistance exercise combined with adequate energy and vitamin D intake maintains bone mineral density during long-duration spaceflight, whereas lower-load resistance exercise without optimized nutrition fails to prevent bone loss.

To maintain bone health in microgravity, you must perform high-load resistance exercises (up to 600 lbs) at least 6 days a week, combined with eating enough calories and protein to maintain body weight and taking vitamin D. Low-load exercise or aerobic activity alone will not stop bone loss.

Adopting a pro-inflammatory diet, as measured by the Dietary Inflammatory Index (DII), significantly increases the risk of developing colorectal cancer (CRC) and cancer-related mortality.

To lower your risk of colorectal cancer, aim for an anti-inflammatory diet. This means minimizing processed foods, added sugars, and refined grains, while maximizing fruits, vegetables, whole grains, and healthy fats. You don't need to calculate a score; just focus on whole, unprocessed foods.

A pro-inflammatory diet is associated with increased risk of cardiovascular disease (CVD) incidence and CVD-related mortality.

Protect your heart by reducing dietary inflammation. Prioritize whole foods like vegetables, fruits, whole grains, and healthy fats, while limiting processed foods and added sugars. This approach supports cardiovascular health independently of other lifestyle factors.