The idea is to expose yourself to natural light, which cues your body clock to suppress production of melatonin, the hormone that makes you sleepy. (health.com)
Lack of exposure to sunlight inhibits production of melatonin, a hormone that puts us to sleep. (susancnt.com)
We know that falling asleep by 10 p.m. provides optimal production of melatonin and helps regulate your daily cortisol output. (saragottfriedmd.com)