Andrew D. Huberman, Ph.D.@hubermanlab• almost 3 years ago

Viewing morning sunlight increases morning cortisol levels by 50%, which is a good thing (early in the day) because it increases immune function, alertness, and “sets” a timer to fall asleep ~14-16 hours later. On clear days do 5-10min. Overcast days 20-30min. Don’t stare.