The functions of the pineal gland include synthesizing the hormone melatonin from the neurotransmitter serotonin. Melatonin ...

According to Nielsen, Americans spent $826 million on melatonin supplements in 2020 — a 43% increase from the year before — likely fueled by multiple COVID-19 pandemic-related stressors.

Melatonin is a hormone the pineal gland produces that is essential for regulating sleep. It acts based on your body's natural 24-hour sleep-wake cycle (circadian rhythm). Melatonin production ...