The Corpozen Journal
Focus
- Cortisol

Cortisol, adrenaline and your daily rhythm: Why you're wiped out at 4 pm and wired at midnight
A plain-language guide to your stress rhythm: what your body clock is, what cortisol actually does, how it differs from adrenaline, and why demanding days leave you wiped out at 4 pm and wired at midnight.
- Focus

Calm focus, no caffeine: What 31 clinical trials say about L-theanine
Focus under pressure isn't about more stimulation. Here's what the research shows L-theanine does for attention and your stress response, the dose that was studied, and how to take it.