Caffeine raises cortisol, which may worsen belly weight or irregular cycles in PCOS. Dietitian Garima Dev Verman highlights that while antioxidants in coffee support long-term metabolism, caffeine can also reduce insulin sensitivity short-term. The safe range is 150-200 mg daily. Moderation, meal-timing, and limiting sugary add-ons help women with PCOS manage caffeine scientifically.