Melatonin 3mg Lozenges 90 count is a natural hormone produced by the pineal gland in the brain. It is made from the amino acid L-tryptophan, which is converted into serotonin and then into melatonin. Its production is regulated by the hypothalamus, which responds to light and dark signals from the eyes. This process helps control circadian rhythms, including the sleep–wake cycle. Melatonin levels rise in the evening to prepare the body for sleep and drop with light exposure. Supplementation may help support restful sleep, ease jet lag, and provide antioxidant benefits.