The hormone melatonin is vitally involved in inducing sleep.

Question

Quizplus · Accepted Answer

Melatonin is a hormone that is produced by the pineal gland in the brain and is involved in regulating circadian rhythms, including the sleep-wake cycle. Its production is stimulated by darkness and suppressed by light, which is why it is often referred to as the "hormone of darkness." Melatonin levels increase in the evening and peak during the night, signaling to the body that it is time to sleep.

The Hormone Melatonin Is Vitally Involved in Inducing Sleep