How to get URL link on X (Twitter) App
Touch your jaw right now. Feel that tension?

Caffeine has a 6-hour half-life.

Caffeine has a 6-hour half-life.
Caffeine’s half-life is ~5–7 hours.

Humming may look silly.
Your vagus nerve controls the muscles of your larynx.

Caffeine has a 6-hour half-life.
30 seconds. Wash your face. Splash cold water. That's it.
1. Don’t just ask what. Ask why.

Step 1: Understand cortisol

1. Walk without your phone or music (20 min)