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Health Effects of Coffee and Tea Consumption

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2026-09-13 22:11 UTC → 2026-09-14 03:42 UTC · added ~~removed~~

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. ~~In men, the~~ New research ~~published~~ suggests coffee may also slow biological ageing through telomere lengthening, which helps protect DNA. A study in ~~the European Journal of Nutrition noted~~ 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 ~~relationship between increased intake and~~ 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 total testosterone levels, though an increase in sex hormone-binding globulin (SHBG) was also observed. Lead author Luca Verroest suggested caffeine may stimulate energy expenditure and fat burning, though the study emphasizes these findings show correlations rather than direct causation. age acceleration.

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