Does Coffee Raise Cortisol? The 90 Minute Claim
Quick Answer Yes, caffeine can raise cortisol, by roughly 30% in one controlled crossover study of 47 healthy young men given about 3.3 mg/kg of caffeine, with the rise appearing about 60 to 120 minutes after the dose. The catch: that response shrinks or disappears in people who drink coffee every day. And the popular…