Your First Cup May Be Costing You More Than You Think: Caffeine, Cortisol, and the Morning Testosterone Window
Caffeine is the most widely consumed performance compound in the United States, and for most men, it arrives before anything else — before food, before sunlight, before the body has completed its natural hormonal morning sequence. The timing, quantity, and pattern of that first cup may be quietly disrupting the hormonal rhythms that govern energy, drive, and testosterone throughout the day.