Finnish study links coffee consumption to improved metabolic health

A study from the University of Oulu in Finland, published in the European Journal of Nutrition, has identified links between habitual coffee consumption and improved metabolic markers. Analyzing data from 2,264 participants in the Northern Finland Birth Cohort 1966, researchers found that individuals who consumed more coffee tended to have lower levels of total and visceral fat and higher skeletal muscle mass, even when body mass index (BMI) remained similar to lower consumers.

The research also highlighted sex-specific hormonal associations. In men, higher coffee intake was linked to more favorable glucose-insulin profiles and higher concentrations of total and bioavailable testosterone. In women, associations were primarily characterized by higher levels of sex hormone-binding globulin (SHBG) and lower measures of free androgens. In both sexes, coffee consumption correlated with lower levels of branched-chain amino acids, which are markers often associated with insulin resistance.

Separately, the American Heart Association stated that consuming up to 400 milligrams of caffeine daily—roughly three to five cups—is considered safe for most adults and may be associated with a reduced risk of cardiovascular diseases, type 2 diabetes, and stroke. However, experts note that caffeine effects vary by individual and that coffee contains other bioactive compounds, such as polyphenols, that may contribute to these health benefits.