Tryptophan

Tryptophan is an essential amino acid used by the body to produce serotonin, a neurotransmitter linked to mood and sleep, and melatonin, the hormone that regulates sleep cycles. For product comparison, Tryptophan should be checked by exact form, plant part or compound type, standardization, amount per serving, and whether it is listed as an active ingredient, other ingredient, or part of a blend. For product comparison, Tryptophan should be checked by exact form, plant part or compound type, standardization, amount per serving, and whether it is listed as an active ingredient, other ingredient, or part of a blend.