Melatonin - Wikipedia, the free encyclopedia

Melatonin i / ˌ m ɛ l ə ˈ t oʊ n ɪ n /, also known chemically as N - acetyl -5- methoxy tryptamine, is a hormone found in animals, plants, and microbes. In animals, circulating levels of melatonin vary in a daily cycle, ...

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