A Finnish study of over 2,200 middle-aged adults published in the European Journal of Nutrition found that higher coffee intake correlates with lower abdominal fat and increased muscle mass.
Researchers observed that heavy coffee drinkers, consuming five or more cups daily, showed lower levels of branched-chain amino acids linked to diabetes risk.
Experts caution that the study is cross-sectional and observational, meaning it identifies a correlation rather than proving coffee directly causes fat loss or muscle growth.