Browse the evidence

Sleep duration of approximately 7 hours per day is associated with the lowest risk of all-cause mortality and cardiovascular events, while both shorter and longer durations increase risk in a U-shaped dose-response relationship.

Aim for approximately 7 hours of sleep per night to minimize your risk of heart disease and early death. Both sleeping significantly less than 7 hours and significantly more than 7 hours is linked to higher health risks. This applies to generally healthy adults; if you have underlying conditions, consult your doctor.

Dapagliflozin, an SGLT2 inhibitor, improves hyperglycemia and facilitates weight loss in type 2 diabetic patients by inducing controlled glucosuria, resulting in a urinary loss of approximately 200–300 kcal/day.

If you have type 2 diabetes, this medication works by having your kidneys flush out excess sugar through your urine. This process burns about 200-300 calories a day without you having to diet or exercise more, leading to modest weight loss and better blood sugar control. It is taken once daily.

Exercise-induced weight loss improves insulin sensitivity in obese women, whereas diet-induced weight loss alone does not significantly improve insulin sensitivity in this population.

To improve your insulin sensitivity, you must exercise. Simply losing weight through dieting may not be enough to fix your metabolic health. Exercise-induced weight loss is required to significantly improve how your body handles insulin.

Higher levels of objectively measured physical activity are causally associated with a significantly lower risk of developing breast and colorectal cancers.

To lower your risk of breast and colorectal cancer, focus on increasing your daily movement rather than intense, time-consuming workouts. The research indicates that a modest increase in average daily acceleration—equivalent to adding about 50 minutes of moderate activity (like brisk walking) or 8 minutes of vigorous activity (like running) per week—is causally linked to significantly lower cancer risks. This benefit appears to be independent of weight loss, suggesting that the act of moving itself triggers protective biological mechanisms.

Lower body fat distribution is independently associated with a reduced risk of metabolic complications, likely due to its greater capacity to store dietary fat and suppress FFA release.

If you store fat in your legs and hips (lower body obesity), you are likely metabolically healthier than someone with the same BMI who stores fat in their belly. Do not try to specifically reduce lower body fat, as this may remove your body's protective fat storage capacity.

Self-reported insomnia in young men is a significant predictor of clinical depression and psychiatric distress decades later, independent of other risk factors.

If you struggle with insomnia, treat it as a serious warning sign for future mental health, not just a nuisance. The risk for depression persists for decades. Prioritize sleep hygiene and seek professional help for sleep disturbances early, as they are a strong predictor of future psychiatric distress.

Phenotypic Age, a composite metric derived from nine clinical chemistry biomarkers and chronological age, serves as a robust predictor of all-cause and cause-specific mortality risk across diverse demographic and health subpopulations, outperforming traditional risk factors like BMI and disease count.

Use a comprehensive clinical panel (including CRP, glucose, albumin, etc.) to calculate a 'Phenotypic Age' rather than relying solely on your birth year. This metric provides a more accurate assessment of your mortality risk and can help identify at-risk individuals earlier than traditional tools like BMI or disease count alone.

Rural residence is associated with higher sedentary behavior and greater perceived barriers to leisure-time physical activity (LTPA) compared to urban residence, primarily driven by caregiving duties, lack of safe places, and fewer environmental enablers like sidewalks and social modeling.

If you live in a rural area, your environment and social context matter more than just 'finding time.' Focus on building social support and seeing others exercise, as these are strong predictors of activity. If caregiving duties are a barrier, look for home-based or short-bout activities rather than trying to fit in long sessions away from home. Addressing safety and social modeling can be as important as building new facilities.

Activation of brown adipose tissue (BAT) through chronic cold exposure increases whole-body energy expenditure and improves insulin sensitivity in adult humans.

If you have detectable brown fat, exposing yourself to mild cold (without shivering) for extended periods (e.g., 5 hours) can increase your daily energy expenditure by 150-300 kcal and improve insulin sensitivity. This is not a quick fix but a physiological lever. Obese individuals may have blunted responses, but the potential for 'browning' white fat exists.

US adults significantly improved overall diet quality between 1999 and 2012, driven primarily by increased consumption of whole grains, nuts/seeds, and whole fruit, alongside decreased consumption of sugar-sweetened beverages.

Focus on swapping sugar-sweetened beverages for water or unsweetened options, and increasing intake of whole grains, nuts, seeds, and whole fruit. These specific changes are the primary drivers of improved diet quality in the US population.

Experiencing weight stigma prospectively causes weight gain and increased risk of obesity, independent of baseline BMI, through obesogenic behavioral and physiological pathways.

Stop using shame as a tool for weight management. The evidence shows that feeling stigmatized actually increases the risk of weight gain and poor metabolic health through stress and behavioral avoidance. Focus on health behaviors (sleep, activity, nutrition) without focusing on weight or size, and avoid stigmatizing language in yourself and others.

In individuals with a normal BMI (18.5–24.9 kg/m2), high body fat percentage (Normal Weight Obesity) is associated with a significantly higher prevalence of cardiometabolic dysregulation and, specifically in women, an independent increase in cardiovascular mortality risk.

If you have a normal BMI, do not assume you are metabolically healthy. High body fat percentage (Normal Weight Obesity) is a significant risk factor for heart disease and death, especially in women. You should assess your body composition (e.g., via DEXA or bioimpedance) rather than relying solely on your weight. Focus on building lean muscle and reducing body fat through resistance training and nutrition, even if your weight stays the same.

A low FODMAP diet significantly reduces total colonic bacterial abundance and increases faecal pH compared to a typical high-FODMAP diet, despite maintaining similar short-chain fatty acid concentrations.

If you are on a low FODMAP diet for IBS, be aware that it significantly reduces the total number of bacteria in your gut compared to a normal diet. While this doesn't necessarily change the amount of beneficial short-chain fatty acids produced, it does alter which bacteria are present. To mitigate this, ensure you are getting enough fiber (like psyllium or resistant starch) and consider liberalizing your FODMAP intake to the minimum amount needed to control symptoms, rather than restricting indefinitely, to support a healthier microbiome structure.

A typical high-FODMAP diet increases the relative abundance of butyrate-producing Clostridium cluster XIVa and mucus-associated Akkermansia muciniphila compared to a low FODMAP diet.

Eating a diet higher in FODMAPs (typical Western/Australian diet) promotes the growth of beneficial bacteria like Clostridium cluster XIVa (butyrate producers) and Akkermansia muciniphila (mucus-associated) compared to a strict low FODMAP diet. This suggests that long-term strict restriction might deprive the gut of substrates needed to maintain these specific beneficial populations.

Chronic elevation of the myokine IL-6 in obesity contributes to insulin resistance, contrasting with its acute anti-inflammatory and insulin-sensitizing effects during exercise.

Don't fear all inflammation. Acute spikes in IL-6 from exercise improve insulin sensitivity. However, chronic high levels of IL-6 associated with obesity contribute to insulin resistance. Focus on reducing chronic inflammation through weight management.

Exercise improves mental health and cognitive function through mechanisms involving BDNF, IGF-1, and myokines like FNDC5 and PGC-1α, which promote neurogenesis and synaptic plasticity.

Regular exercise boosts brain-derived neurotrophic factor (BDNF) and other growth factors that support brain health and reduce the risk of depression. Make exercise a regular part of your routine to support your mental well-being.

Exercise improves glucose tolerance and insulin sensitivity through mechanisms independent of the insulin receptor, bypassing insulin resistance in type 2 diabetes.

If you have type 2 diabetes or are at risk, exercise helps your muscles take up glucose without relying on insulin. This bypasses the resistance that makes medication less effective. Combine exercise with other lifestyle changes for the best results.

Vitamin D deficiency, defined as serum 25(OH)D <50 nmol/L, is prevalent in 30-60% of populations in Western, Southern, and Eastern Europe, and up to 80% in Middle Eastern countries, with severe deficiency (<30 nmol/L) affecting >10% of Europeans.

If you live in Western, Southern, or Eastern Europe, or the Middle East, your Vitamin D levels are likely below the recommended 50 nmol/L threshold. This is not just a Nordic issue; it is widespread. You should get your levels tested, especially if you are in a risk group like older age, pregnant, or non-Western immigrant.

Skeletal muscle acts as an endocrine organ that releases myokines (such as IL-6) during contraction, which exert hormone-like effects on other organs to protect against chronic diseases associated with physical inactivity.

Regular physical activity triggers your muscles to release signaling proteins (myokines) that travel through your blood to protect your heart, brain, and metabolism. You don't need to do extreme workouts; the act of contracting muscles sends these protective signals. Consistency in movement is key to maintaining this hormonal protection against chronic disease.

Physical inactivity leads to visceral fat accumulation and chronic systemic inflammation, which promotes insulin resistance, atherosclerosis, neurodegeneration, and tumor growth, constituting a 'diseasome of physical inactivity'.

Sitting too much causes your belly fat to become inflamed, which damages your blood vessels, brain, and metabolism, even if you are not overweight. To prevent this 'diseasome' of diseases, you must move regularly to keep inflammatory pathways in check, regardless of your current weight.

Exercise-induced IL-6 acts as an anti-inflammatory and metabolic regulator in muscle, activating AMPK to increase glucose uptake and fatty acid oxidation, distinct from the pro-inflammatory role of IL-6 in immune cells.

The IL-6 released by your muscles during exercise is not the harmful kind associated with infection. Instead, it acts as a signal to boost your metabolism, helping your muscles burn fat and sugar more efficiently. This specific type of IL-6 also helps reduce systemic inflammation.

Visceral adipose tissue accumulation drives insulin resistance and metabolic syndrome, whereas subcutaneous adipose tissue accumulation is protective or neutral.

Focus on reducing visceral fat (belly fat) rather than just total weight. While subcutaneous fat (hips/flanks) is less harmful, visceral fat is a primary driver of insulin resistance. Strategies that target visceral fat, such as aerobic exercise and stress management, are likely more effective for metabolic health than weight loss alone.

Short-term circadian misalignment (rapid 12-hour inversion of behavioral cycles) increases 24-hour systolic and diastolic blood pressure and inflammatory markers (IL-6, CRP, TNF-α, resistin) in healthy adults, independent of sleep duration.

If you work night shifts or have an irregular schedule, your body's internal clock is likely misaligned with your behavior, raising your blood pressure and inflammation even if you sleep enough. To mitigate this, try to maintain consistent sleep/wake times as much as possible, expose yourself to bright light during your 'day' (even if it's night), and avoid heavy meals during your biological night. Recognizing that the *timing* itself is the stressor can help you prioritize schedule stability.

Dietary intake of resistant carbohydrates (dietary fibers) increases the abundance of Eubacterium species, which produce short-chain fatty acids (SCFAs) like butyrate that reduce gut inflammation and improve metabolic health.

To support your gut health, prioritize foods rich in resistant carbohydrates, such as whole grains, legumes, and certain fruits. These fibers feed beneficial bacteria like Eubacterium, which produce butyrate to reduce inflammation and support metabolic health. If you are new to high-fiber diets, increase intake gradually to minimize digestive discomfort.