# Health Effects of Coffee and Tea Consumption > Live situation record from CLSTR: https://clstr.news/situations/health-effects-of-coffee-consumption > Updated: 2026-09-13T11:21:00.000Z. Sources: 83. Developments: 19. Observational evidence continues to link regular coffee consumption with multiple health benefits, particularly regarding liver, cardiovascular, and cognitive health. A long-term study of over 350,000 UK Biobank participants found that drinking one to five or more cups daily is associated with a lower incidence of serious liver conditions, including cirrhosis, liver cancer, and fatty liver disease. These protective effects were observed in both caffeinated and decaffeinated coffee, suggesting that compounds other than caffeine may be responsible. Beyond liver health, moderate intake is associated with lower risks of type-2 diabetes, early mortality, and potential protection against Alzheimer’s and Parkinson’s. The American Heart Association (AHA) maintains that up to 400 mg of caffeine per day is generally safe and linked to reduced risks of heart failure, stroke, and atrial fibrillation. Recent research suggests caffeine may slow the aging process by activating the AMPK enzyme system, which supports DNA repair and metabolic balance. Expanding on metabolic health, a study of over 2,000 participants from the ‘Northern Finland Birth Cohort 1966’ identified correlations between regular coffee consumption and improved body composition. Researchers noted that individuals consuming more coffee tended to have higher muscle mass and lower levels of total and visceral body fat, even when BMI remained similar to non-consumers. New research suggests coffee may also slow biological ageing through telomere lengthening, which helps protect DNA. A study in BMJ Mental Health indicated that drinking 3-4 cups daily may slow biological ageing in individuals with severe mental illness. Researchers from King's College London found coffee drinkers could have a lifespan equivalent to ‘five extra years’ compared to non-drinkers. The method of preparation appears relevant; filtered coffee is linked to lower biological age acceleration, whereas instant coffee is associated with higher age acceleration. ## Claims - Up to 400 mg of caffeine per day (about three to five cups) is safe for most adults and linked to lower risk of heart failure, stroke, coronary disease, hypertension, atrial fibrillation and type‑2 di (corroborated by 4 sources) - Consuming more than four to five cups of coffee per day may increase blood pressure and cause arrhythmias; energy drinks pose additional cardiovascular risks. (corroborated by 4 sources) - Researchers at the University of Oulu investigated the link between coffee consumption and hormonal health. (corroborated by 4 sources) - The study findings were published in the ‘European Journal of Nutrition’. (corroborated by 4 sources) - The study analyzed data from 2,264 participants from a Finnish longitudinal study. (corroborated by 4 sources) - In men, higher daily coffee consumption was associated with higher average testosterone levels. (corroborated by 4 sources) - Higher coffee consumption was linked to lower body fat, less abdominal fat, and higher muscle mass. (corroborated by 4 sources) - In men, increased coffee consumption correlated with lower insulin levels and improved insulin sensitivity. (corroborated by 4 sources) - Regular coffee consumption is associated with a lower risk of cirrhosis and liver cancer. (corroborated by 3 sources) - Unfiltered coffee contains cafestol, which can raise LDL cholesterol, while filtered coffee contains much less. (corroborated by 3 sources) - Consuming up to five cups of coffee daily is linked to lower risk of cardiovascular disease, including heart failure, stroke and coronary artery disease. (corroborated by 3 sources) ## Timeline ### 2026-09-13: Coffee consumption linked to higher muscle mass and lower visceral fat A study of over 2,000 participants suggests regular coffee consumption is linked to higher muscle mass, lower visceral fat, and increased total testosterone levels in men. 6 sources. https://clstr.news/cluster/coffee-consumption-linked-to-higher-muscle-mass-and-lower-visceral-fat ### 2026-09-12: Coffee consumption linked to slower biological ageing Studies suggest coffee consumption may slow biological ageing by lengthening telomeres and improving heart health, while its antioxidant properties offer potential skincare and haircare benefits. 2 sources. https://clstr.news/cluster/coffee-consumption-linked-to-slower-biological-ageing ### 2026-09-09: Caffeine consumption linked to slower aging and heart health benefits Scientific studies suggest moderate caffeine consumption may slow aging via the AMPK enzyme and reduce cardiovascular risks, while green tea combinations can enhance focus and metabolic health. 6 sources. https://clstr.news/cluster/coffee-consumption-linked-to-reduced-cardiovascular-risks ### 2026-09-06: Health experts provide guidance on safe coffee consumption habits Medical experts advise on healthy coffee consumption, warning against drinking it immediately on an empty stomach to avoid blood pressure spikes, while noting black coffee may support kidney health. 2 sources. https://clstr.news/cluster/health-experts-provide-guidance-on-safe-coffee-consumption-habits ### 2026-09-05: Coffee consumption linked to lower body fat and higher muscle mass Studies suggest coffee consumption may be linked to lower visceral fat and higher muscle mass, with green coffee extracts showing potential for modest weight and fat reduction. 4 sources. https://clstr.news/cluster/coffee-consumption-linked-to-lower-body-fat-and-higher-muscle-mass-1 ### 2026-09-02: Coffee consumption linked to muscle mass and hormonal changes New studies reveal that coffee consumption is linked to higher muscle mass and specific hormonal changes, though consuming more than five cups daily may be associated with lower bone density in women. 6 sources. https://clstr.news/cluster/research-examines-health-impacts-of-tea-and-coffee-consumption ### 2026-09-01: University of Oulu study links coffee to improved body composition A Finnish study suggests higher coffee consumption is linked to lower body fat, increased muscle mass, and improved metabolic and hormonal markers, even among individuals with similar BMIs. 2 sources. https://clstr.news/cluster/university-of-oulu-study-links-coffee-to-improved-body-composition ### 2026-08-28: Caffeine consumption linked to varied cardiovascular health outcomes Studies show caffeine does not increase extra heartbeats in general populations, but two or more cups of coffee daily may double the risk of cardiovascular death for individuals with severe hypertension. 2 sources. https://clstr.news/cluster/caffeine-consumption-linked-to-varied-cardiovascular-health-outcomes ### 2026-08-26: University of Oulu study links coffee to higher testosterone in men A University of Oulu study finds that higher coffee consumption in men is statistically linked to higher testosterone levels, improved insulin sensitivity, and lower body fat. 6 sources. https://clstr.news/cluster/university-of-oulu-study-links-coffee-to-higher-testosterone-in-men ### 2026-08-24: Coffee consumption linked to lower body fat and higher muscle mass A Finnish study suggests regular coffee consumption is associated with lower visceral fat, less total body fat, and higher muscle mass, even when BMI remains constant. 6 sources. https://clstr.news/cluster/coffee-consumption-linked-to-lower-body-fat-and-higher-muscle-mass ### 2026-08-24: Coffee consumption impacts dementia risk and blood pressure Medical research explores the dual nature of coffee: potential dementia risk reduction through moderate consumption versus the risks of caffeine toxicity and its impact on hypertension management. 2 sources. https://clstr.news/cluster/coffee-consumption-impacts-dementia-risk-and-blood-pressure ### 2026-08-22: Coffee consumption linked to metabolic health and minimal bone impact Research indicates that moderate coffee consumption has a minimal impact on bone density and may be linked to healthier body composition, including lower abdominal fat and increased muscle mass. 2 sources. https://clstr.news/cluster/coffee-consumption-linked-to-metabolic-health-and-minimal-bone-impact ### 2026-08-22: University of Oulu study links coffee consumption to metabolic and hormonal changes Researchers in Finland found that higher coffee consumption is linked to lower body fat, increased muscle mass, and specific hormonal changes, including higher testosterone levels in men. 6 sources. https://clstr.news/cluster/university-of-oulu-study-links-coffee-consumption-to-metabolic-and-hormonal-changes-1 ### 2026-08-15: Finnish study links coffee consumption to improved metabolic health A Finnish study links regular coffee consumption to improved body composition, higher muscle mass, and healthier metabolic profiles, with distinct hormonal effects observed in men and women. 11 sources. https://clstr.news/cluster/coffee-consumption-linked-to-higher-muscle-mass-and-lower-fat ### 2026-08-13: Coffee consumption linked to lower visceral fat and heart health benefits Studies indicate that drinking up to five cups of coffee daily may reduce visceral fat, increase muscle mass, and lower the risk of cardiovascular disease and type 2 diabetes. 4 sources. https://clstr.news/cluster/coffee-consumption-linked-to-heart-health-and-lower-visceral-fat ### 2026-08-10: Coffee consumption and heart health risks for high blood pressure Research indicates that while moderate coffee intake is generally safe, individuals with severe high blood pressure may face double the risk of heart disease if consuming two or more cups daily. 3 sources. https://clstr.news/cluster/coffee-consumption-and-heart-health-risks-for-high-blood-pressure ### 2026-08-02: Coffee intake linked to reduced liver and heart disease risk Observational UK study links regular coffee to lower liver disease risk; AHA says up to 400 mg caffeine (3‑5 cups) is safe and may cut heart disease risk, with benefits from coffee compounds beyond caffeine. 14 sources. https://clstr.news/cluster/moderate-coffee-consumption-linked-to-lower-heart-disease-risk ### 2026-07-31: Coffee Consumption Linked to Lower Risk of Liver Disease Studies link moderate coffee drinking to lower risks of liver fibrosis, fatty liver disease, liver cancer, diabetes, and early death, though it is not a cure and excess may cause side effects. 3 sources. https://clstr.news/cluster/coffee-consumption-linked-to-lower-risk-of-liver-disease ### 2026-07-02: Coffee Consumption Linked to Kidney Risk in Slow Metabolizers and Interacts with Common Medications Heavy coffee raises early kidney‑damage risk in slow caffeine metabolisers and can reduce absorption or boost side effects of common drugs such as thyroid medication and antidepressants. 3 sources. https://clstr.news/cluster/coffee-consumption-linked-to-kidney-risk-in-slow-metabolizers-and-interacts-with-common-medications --- Cite as: Health Effects of Coffee and Tea Consumption. CLSTR, https://clstr.news/situations/health-effects-of-coffee-consumption