<span>The brain's pineal gland produces the hormone melatonin, which helps control your sleepiness and wakefulness cycles. Melatonin is a natural hormone in the body which production is </span>stimulated by darkness and decreased by light. This hormone is involved in the <span>internal body clock and regulates diverse body functions.</span>
Melatonin is the hormone produced by the brain's pineal gland. This hormone helps in regulating one's sleep cycle - i.e. controls sleepiness and wakefulness.
