A new study adds to a growing body of evidence that coffee, long reduced to its caffeine kick, may carry deeper physiological consequences — including measurable differences in muscle mass and body fat between regular drinkers and those who abstain. The findings arrive amid a broader scientific reckoning with coffee's effects on the liver, the heart, and the gut, suggesting that what billions of people reach for each morning is neither as simple nor as neutral as habit might imply. As with so many substances woven into daily life, the emerging picture is not one of universal benefit or harm, b