Browse the evidence

There is no significant association between sugar-sweetened beverage consumption and the risk of total stroke.

While reducing SSBs is crucial for heart health, current evidence does not show a significant link to stroke risk in the general population. However, since SSBs increase blood pressure and heart disease risk, avoiding them remains the best strategy for overall cardiovascular health.

Small nucleolar size is a conserved cellular hallmark of longevity and metabolic health across multiple species, including C. elegans, Drosophila, mice, and humans.

This research identifies small nucleoli as a marker of longevity and metabolic health. While you cannot directly 'exercise' your nucleoli, interventions that promote longevity—such as dietary restriction and exercise—are associated with this cellular feature. For humans, combining modest caloric restriction with increased physical activity was linked to smaller nucleoli in muscle biopsies, suggesting this cellular change is a reversible marker of metabolic improvement.

In patients with cirrhosis, sarcopenia is driven by a multifactorial imbalance between protein synthesis and breakdown, specifically involving hyperammonemia, increased autophagy, and impaired mitochondrial function, rather than just caloric deficit.

For cirrhosis patients, muscle loss is a complex biological failure, not just a diet problem. Treatment requires addressing the root causes like ammonia levels and inflammation, not just increasing calories.

Combining clinical features (male sex, habitual snoring, supine sleep, heartburn, driving drowsiness, alcohol, BMI, age) with overnight oximetry allows confident diagnosis or exclusion of Obstructive Sleep Apnoea (OSA) in approximately one-third of patients, thereby reducing the need for full polysomnography.

If you have risk factors like male sex, high BMI, habitual snoring, or daytime drowsiness while driving, you are at higher risk for OSA. However, these symptoms alone are not enough to diagnose you. Combining these risk factors with a simple overnight oxygen saturation test (oximetry) can identify about one-third of cases accurately without needing a full, expensive sleep study (polysomnography). If your risk score is high but oximetry is inconclusive, full polysomnography is still required.

Habitual snoring occurring 'every night' is a significant predictor of OSA, whereas less frequent snoring is not, and daytime sleepiness (EDS) is only predictive when it manifests as dozing while driving.

Not all snoring or sleepiness indicates OSA. For snoring, it must be habitual (every night) to be a strong predictor. For daytime sleepiness, general tiredness is not predictive, but specifically dozing off while driving is a significant red flag for OSA.

Exogenous antioxidant supplementation does not consistently extend lifespan in model organisms and may shorten it in healthy wild-type animals, contradicting the Free Radical Theory of Aging.

Do not rely on antioxidant supplements (Vitamins C, E, etc.) to extend your lifespan. Current evidence from model organisms suggests they are ineffective or potentially harmful in healthy individuals. Focus on established longevity interventions like calorie restriction or exercise, which have more robust evidence for extending healthspan and lifespan.

High oxidative muscle fibers remain small despite high protein synthesis capacity because increased mitochondrial biogenesis via AMPK attenuates myofibrillar protein synthesis and higher expression of E3-ligases increases protein degradation.

High oxidative (Type I) fibers are genetically predisposed to be smaller and more fatigue-resistant. They have higher rates of protein turnover (both synthesis and degradation). To maximize size in these fibers, resistance training must overcome the natural tendency for degradation and the inhibitory effects of mitochondrial signaling.

The maximum rate of oxygen consumption (VO2max) per unit volume is inversely proportional to muscle fiber cross-sectional area (CSA) due to oxygen diffusion constraints, creating an evolutionary design constraint where larger fibers cannot support high oxidative capacity without developing anoxic cores.

As muscles get larger, their ability to use oxygen efficiently per unit of volume decreases. This is why bodybuilders often have lower VO2max relative to their muscle mass compared to endurance athletes. You cannot simply 'train' away this physical diffusion limit, though capillary density can help mitigate it.

Higher intake of alcohol (per 10 g/day increment) is associated with an 8% higher risk of colorectal cancer, independent of meat and fiber intake.

Increasing alcohol intake is linked to a higher risk of colorectal cancer. For every 10 grams of alcohol consumed per day, risk increases by 8%. Reducing alcohol intake can help lower this risk.

Fish, poultry, cheese, tea, and coffee consumption are not associated with colorectal cancer risk in this study.

You do not need to avoid fish, poultry, cheese, tea, or coffee due to colorectal cancer risk, as this study found no association.

Genetic variants associated with obesity (such as FTO) explain less than 3% of BMI variation, failing to account for the 47-80% heritability estimates or the rapid global rise in obesity prevalence.

Do not blame your genetics for obesity. Current science shows that known genetic markers account for less than 3% of body weight variation. The rapid global increase in obesity is driven by environmental and lifestyle factors, not a sudden change in human DNA. This means your daily choices regarding diet and activity have a disproportionately large impact on your weight compared to your genetic predisposition.

Caloric restriction (30-40%) delays age-related DNA methylation drift, resulting in a significantly younger biological (methylation) age compared to chronological age in mice and rhesus monkeys.

In animal models, sustained caloric restriction (30-40% reduction) significantly slows the epigenetic aging clock, making biological tissues appear years younger than their chronological age. This suggests that managing energy intake may be a potent lever for delaying molecular aging processes in mammals.

Long-term exclusive muscular strength training (minimum 12 months, no aerobic component) is associated with lower whole-body arterial compliance and higher pulse pressure compared to sedentary controls, indicating increased arterial stiffness.

If you exclusively perform heavy resistance training without any aerobic activity, your arteries may become stiffer and your pulse pressure higher compared to someone who is sedentary. This does not mean you should stop lifting, but it suggests that adding aerobic exercise may be necessary to maintain optimal arterial elasticity and reduce cardiovascular risk markers associated with stiffness.

Palatability stimulates food intake through a distinct hedonic neural system that operates independently of homeostatic satiety signals, often leading to overconsumption even when sated.

Recognize that 'tasty' food triggers a reward system in your brain that is separate from your body's hunger signals. This means you can feel full but still be driven to eat more by the pleasure of the food. To manage intake, focus on reducing the hedonic appeal (palatability) of foods rather than just relying on feeling full.

Low-carbohydrate weight-loss diets decrease the concentration of microbially produced short-chain fatty acids and reduce the proportion of butyrate-producing bacteria.

If you are on a low-carb diet for weight loss, be aware that it may reduce beneficial gut bacteria and short-chain fatty acids. Try to include as much nondigestible carbohydrate (fiber) as possible within your dietary constraints to mitigate this.

Dietary antioxidant supplementation (specifically Vitamin E and C) does not improve muscular performance or endurance and may potentially increase mortality risk, contradicting the hypothesis that it protects against exercise-induced damage.

Avoid relying on Vitamin E or C supplements to boost exercise performance or protect muscles. Evidence shows they offer no performance benefit and Vitamin E supplementation has been linked to increased mortality in some reviews. Focus on whole foods for antioxidant needs.

Regular consumption of non-soya pulses does not significantly affect serum HDL-cholesterol levels.

While pulses are excellent for lowering bad cholesterol and triglycerides, don't expect them to significantly raise your 'good' HDL cholesterol. Focus on their proven benefits for LDL and triglycerides.

Low socioeconomic status (SES) is associated with accelerated epigenetic aging, specifically an increase in biological age of approximately 1 year compared to high SES, independent of major lifestyle risk factors.

Social environment impacts biological aging. While you cannot change your past, improving your social and economic conditions, especially in early life, may help slow down biological aging processes. Focus on reducing chronic stress and building supportive social networks as these are key components of socioeconomic well-being.

Aging is associated with a decline in skeletal muscle mitochondrial capacity, exercise efficiency, and insulin sensitivity, even when habitual physical activity levels are comparable to young adults.

Aging naturally reduces muscle mitochondrial capacity and insulin sensitivity, even if you stay active. This decline contributes to reduced exercise efficiency and physical function, highlighting the importance of targeted exercise training to mitigate these age-related changes.

Sleep quality shows a linear increase from Monday to Friday for all individuals, regardless of their mindfulness levels.

Expect your sleep quality to naturally improve as the work week progresses, likely due to completing tasks and anticipating the weekend. This trend occurs for everyone, regardless of their mindfulness level.

Breastfeeding is associated with beneficial effects in avoiding excess infant weight gain, childhood obesity, and higher blood pressure compared to formula feeding.

Encourage breastfeeding if possible, as it helps prevent excessive weight gain and obesity. If breastfeeding is not an option, focus on avoiding overfeeding with formula and delaying the introduction of solid foods until 6 months of age.

Mitochondrial dysfunction acts as a primary driver of skeletal muscle atrophy by triggering catabolic signaling pathways that promote the expression of muscle atrophy genes and increasing oxidative stress.

To support muscle mass, prioritize activities that improve mitochondrial health, such as regular aerobic and resistance exercise. These interventions help regulate mitochondrial function and may prevent or treat muscle atrophy, especially in aging or diseased states.

Frequent sauna bathing (4-7 times per week) is associated with a significantly reduced risk of sudden cardiac death, fatal coronary heart disease, fatal cardiovascular disease, and all-cause mortality compared to infrequent use (1 time per week).

If you have access to a traditional Finnish sauna, aiming for 4-7 sessions per week, with each session lasting over 19 minutes at temperatures around 80-100°C, is associated with a significantly lower risk of death from heart disease and all causes. This benefit is observed in middle-aged men. If you have heart conditions, consult a doctor, but for stable individuals, this habit appears protective.

Severe muscle injuries heal incompletely with fibrotic tissue formation that impairs function, whereas minor injuries (strains) heal spontaneously without significant fibrosis.

If you have a minor muscle strain, rest and time will likely fix it. However, if you have a severe tear or laceration, it will likely scar and lose function without specific medical intervention. Do not assume all muscle injuries heal the same way.