ABC - DEF - GHI - JKL - MNO - PQRS - TUV - WXYZ Melatonin
Similar term(s): melatonine.
Definition:
Melatonin is a hormone formed by the pineal gland (which is located in the
center of the brain). Melatonin regulates the sleep-wake cycle and is stimulated
by darkness and inhibited by light. Melatonin is also available in some
countries as a drug or a dietary supplement which acts against insomnia and
jet-lag.
Source: GreenFacts
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