Drank Coffee Only in the Morning for 21 Days — My Body's Cortisol Changed

What happens when you only drink coffee in the morning for 21 days? Your cortisol rhythm, sleep quality, and energy patterns completely change. I tested morning-only caffeine for 21 days to see what happens inside the body. No afternoon coffee. Just morning intake before 10 AM. Results by week: ✅ Days 1-7: Afternoon crash adjustment, withdrawal symptoms ✅ Days 8-14: Cortisol stabilizes, adenosine receptors reset ✅ Days 15-21: Sleep improves, natural energy emerges The science: Cortisol peaks naturally at 8-9 AM Afternoon caffeine blocks adenosine (sleep pressure) Coffee timing affects circadian rhythm Morning-only = better sleep architecture This is educational content about caffeine physiology, not medical advice. Subscribe for evidence-based body science. #morningcoffee #CoffeeTiming #21daychallenge #CortisolRhythm #CaffeineScience #sleepquality #healthtransformation #energyboost