Browse the evidence

Caloric restriction, exercise, and circadian rhythm calibration are health-promoting activities that delay aging and extend healthspan.

To delay aging, incorporate caloric restriction, regular exercise, and consistent circadian rhythms into your routine. These behaviors are proven to extend healthspan.

Physical exercise induces Nrf2-dependent mitochondrial biogenesis in skeletal muscle and the brain, contributing to neuroprotection and metabolic health.

Engage in moderate-intensity physical exercise regularly. This activity triggers the Nrf2 pathway, which increases the number and function of mitochondria in your muscles and brain. This biological upgrade supports energy levels, cognitive function, and resilience against age-related decline.

Hybrid training (voluntary and electrical muscle contractions) can ameliorate insulin resistance by suppressing serum IL-6 levels in skeletal muscle.

Combining voluntary exercise with electrical muscle stimulation may help reduce inflammation and improve insulin sensitivity, particularly for those with fatty liver disease.

Whole grains protect against cancer, particularly colon and breast cancer, through the action of antioxidants, lignans, and other bioactive compounds found in the bran and germ.

Include whole grains in your diet to reduce cancer risk. The bran and germ contain antioxidants, lignans, and phytic acid that protect cells from damage. These compounds are lost when grains are refined, so choose whole grain products to maximize these protective benefits.

Whole grains improve gut health by increasing stool weight, accelerating transit, and altering microflora to produce short-chain fatty acids (SCFA) that lower colonic pH and provide immune protection.

Eat whole grains to support your gut health. The fiber in whole grains ferments in the colon to produce beneficial short-chain fatty acids that nourish colon cells and lower pH. This process also increases stool weight and speeds up transit, reducing the risk of colon cancer.

Circadian misalignment, specifically evening chronotype and social jet lag, is associated with increased risk for obesity, type II diabetes, and cardiovascular disease in humans.

If you naturally prefer sleeping later (evening chronotype), you are at higher risk for metabolic issues like diabetes and obesity, even if you get enough sleep. To mitigate this, try to avoid large meals late at night and seek bright light in the morning to help anchor your circadian rhythm, reducing the 'social jet lag' caused by early work/school start times.

Insufficient sleep imposes substantial economic costs on OECD countries, estimated at up to $680 billion annually in lost GDP across five major economies.

While this is a macroeconomic finding, it underscores the importance of sleep for societal well-being. On an individual level, prioritizing sleep contributes to economic stability and personal productivity.

L-carnitine supplementation ameliorates complications in uremic patients undergoing hemodialysis, including cardiac dysfunction, intradialytic hypotension, and erythropoietin-resistant anemia.

If you are on hemodialysis, your body likely loses carnitine during treatment, which can worsen heart function, cause low blood pressure during sessions, and make anemia harder to treat. Discussing L-carnitine supplementation with your nephrologist may help manage these specific complications, although you should be aware that clinical evidence is still evolving.

Acetyl-L-carnitine (ALC) supplementation improves nerve conduction, neuropathic pain, and immune function in diabetes patients, particularly in the early metabolic phase of diabetic polyneuropathy.

If you have diabetes and are experiencing early nerve pain or slowing nerve conduction, Acetyl-L-carnitine (ALC) may help improve nerve function and reduce pain by supporting mitochondrial health. However, this intervention is most effective in the early stages of nerve damage before structural changes become permanent.

Acetate administration, whether via oral vinegar, colonic infusion, or microbial fermentation of acetogenic fibers, improves body weight control and insulin sensitivity through mechanisms involving increased energy expenditure, fat oxidation, and the secretion of satiety hormones (GLP-1, PYY).

To leverage acetate for metabolic health, you can consume vinegar (containing acetic acid) or foods rich in acetogenic fibers (like inulin or galacto-oligosaccharides). Studies suggest that 0.75g to 1.5g of acetic acid daily from vinegar may help with modest weight loss and improved fat oxidation in overweight individuals. However, results vary, and targeting the distal colon (via fiber fermentation) might be more effective for hormone secretion than direct acetate absorption in the upper gut. There is no single 'best' dose, and individual response depends on your gut microbiome composition.

Preoperative carbohydrate loading with iso-osmolar drinks 2-3 hours before anesthesia reduces postoperative insulin resistance and length of stay in major abdominal surgery, and is safe in bariatric patients.

Follow your anesthesia team's instructions on preoperative fasting. Modern ERAS protocols often allow you to drink a special carbohydrate-rich clear fluid up to 2 hours before your surgery. This helps reduce stress on your body and may shorten your hospital stay. Do not eat solid food within 6 hours of surgery.

Adherence to meat-based or 'Western' dietary patterns is positively associated with elevated levels of inflammatory biomarkers, particularly C-reactive protein (CRP), whereas vegetable- and fruit-based or 'healthy' patterns are inversely associated with these markers.

Focus on building your diet around vegetables, fruits, and whole grains rather than meat and refined grains. This pattern is consistently linked to lower levels of inflammatory markers like CRP, which are associated with chronic diseases. While individual food choices matter, the overall pattern of eating has a stronger impact on inflammation.

In elderly men, bioavailable testosterone (specifically non-SHBG-bound T) is positively associated with muscle strength and bone mineral density, while being inversely associated with fat mass.

For elderly men experiencing muscle loss or bone density decline, standard total testosterone tests may be misleading due to age-related increases in SHBG. Bioavailable or free testosterone levels are better indicators of muscle and bone health. While this study is observational, it suggests that maintaining higher bioavailable testosterone is associated with better physical function.

Bariatric surgery (gastric bypass, banding, gastroplasty) produces substantial weight loss (10-159 kg) and improves comorbidities in patients with extreme obesity (BMI >= 40 or >= 35 with comorbidities).

For those with extreme obesity, bariatric surgery is the most effective way to lose a large amount of weight (10-159 kg) and improve health conditions. It is a major decision with risks, but the benefits are substantial for eligible patients.

Timed food restriction or scheduled meal timing can serve as a potent non-photic zeitgeber to resynchronize peripheral clocks and improve activity rhythms in aged individuals, potentially mitigating age-associated pathologies.

Try eating your meals within a consistent daily window (e.g., 8-10 hours). This regularity acts as a strong time cue for your body's organs, helping to stabilize your sleep and metabolism, especially as you age.

Exercise interventions for mechanical neck disorders (MND) provide small-to-moderate improvements in pain and function, with no single exercise type (strengthening, stretching, stabilization, aerobic) demonstrating clear superiority over others.

If you have mechanical neck pain, regular exercise is recommended. It does not matter if you choose strengthening, stretching, or stabilization exercises; the key is consistency. Aim for a program lasting 8-24 weeks, performed 2-3 times per week, ideally combined with manual therapy or education for best results.

Sarcopenia (low skeletal muscle mass) is independently associated with increased insulin resistance and dysglycemia, and this association is significantly stronger in individuals under 60 years of age compared to those 60 and older.

Maintaining or building skeletal muscle mass is a critical strategy for metabolic health, independent of your weight. This is especially important for adults under 60, where low muscle mass strongly predicts insulin resistance and diabetes risk. Focus on resistance training and adequate protein intake to preserve muscle, not just fat loss.

Intermittent fasting (IF) and prolonged fasting (PF) are safe and effective interventions that mimic the health benefits of chronic dietary restriction, including reduced inflammation and improved insulin sensitivity, without the severe side effects of continuous caloric restriction.

If you are not diabetic or on insulin, try alternate-day fasting (eating normally one day, restricting to ~500-600 calories the next) or periodic prolonged fasting (water-only for 2+ days, once a month). These methods reduce inflammation and improve insulin sensitivity without the constant hunger of daily dieting. If you have diabetes, consult your doctor before attempting any fasting regimen due to hypoglycemia risks.

COVID-19 physical distancing restrictions and remote work/schooling lead to increased recreational screen time and decreased physical activity in parents and young children.

During periods of remote work or school, expect increased screen time and decreased physical activity. To counter this, schedule specific times for active play and try to integrate movement into screen-based activities (e.g., active video games) or ensure breaks from screens include physical movement. Focus on maintaining routines rather than achieving pre-pandemic levels of intensity.

COVID-19 restrictions lead to increased consumption of snack foods (chips, cookies) and decreased consumption of fast food/take-out among parents and children.

Expect an increase in snack food consumption during periods of stress or boredom. To mitigate this, keep healthy snacks accessible and involve children in meal preparation. Focus on reducing fast food/take-out by cooking more meals from scratch, which many families found to be a positive change.

Participation in organized sports provides significant psychosocial and behavioral health benefits beyond the physiological effects of physical activity, including reduced alcohol consumption and improved social integration.

If you enjoy organized sports, prioritize them. The social structure and behavioral norms of team sports (like reduced alcohol use) offer health benefits that solo exercise routines often miss.

Polarization of physical activity (high-intensity training combined with high sedentary time) may lead to increased health risks despite meeting physical activity recommendations.

If you do intense workouts, do not sit for the rest of the day. Break up sedentary time with light movement to avoid the health risks associated with 'polarization'.

Melatonin is necessary for proper insulin synthesis, secretion, and action; its absence or reduction leads to insulin resistance, glucose intolerance, and a diabetogenic syndrome.

If you work night shifts or are exposed to bright lights at night, your body's natural melatonin production may be suppressed, leading to insulin resistance and weight gain. Restoring a dark sleep environment or considering melatonin supplementation (under medical guidance) may help restore metabolic health by improving insulin sensitivity.

High levels of perceived psychological stress are significantly associated with poor sleep quality in medical students, with stressed students having an 86% prevalence of poor sleep compared to 64% in non-stressed students.

If you are a student or high-performer feeling stressed, recognize that your sleep problems are likely a symptom of that stress, not just a bad habit. The data shows stressed individuals are much more likely to have poor sleep. Instead of just forcing yourself to stay awake to study, address the stressor directly (e.g., through counseling or time management) because the stress itself is driving the sleep disruption. Prioritizing sleep hygiene is a medical recommendation for this population to break the cycle of stress-induced insomnia.