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Commonly discussed for Sleep9
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A hormone produced by the body in a daily cycle; synthetic melatonin is also used in products sold in some markets.
A botanical supplement category made from Withania somnifera, commonly supplied as a root preparation or extract.
5-hydroxytryptophan, a compound the body makes from the amino acid tryptophan; the supplement form is typically extracted from the seeds of the Griffonia simplicifolia plant.
Gamma-aminobutyric acid, a molecule made in the body and present in some fermented foods; sold as a supplement.
A supplement form of the amino acid glycine, taken as a powder or capsules; it has a mildly sweet taste.
A supplement providing L-tryptophan, an essential amino acid found in protein-rich foods; in the body it is a precursor to serotonin and to niacin (vitamin B3), and it is also the precursor to 5-HTP. Taken as capsules or tablets.
A supplement category for magnesium salts such as magnesium glycinate and magnesium citrate.
A concentrated supplement made from the root of valerian (Valeriana officinalis), a source of constituents such as valerenic acid; distinct from valerian tea. Taken as capsules, tablets, or extract.
A combination supplement of zinc, magnesium, and vitamin B6, taken as capsules; a common sports-nutrition product.