
Daylight, brain serotonin, and the gut's separate pool
Morning light reaches brain serotonin through the eye. The gut's serotonin does not commute upstairs to become a mood.
Priya Raman
3 articles with this tag

Morning light reaches brain serotonin through the eye. The gut's serotonin does not commute upstairs to become a mood.

The big growth-hormone pulse rides slow-wave sleep. Going to bed early does nothing if that deep sleep never arrives.

A short night raises the morning cortisol signal and makes the same breakfast harder for insulin to clear.