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Definition of L-TRYPTOPHAN
: the levorotatory form of tryptophan that is a precursor of serotonin and was used formerly as a dietary supplement especially to promote sleep and relieve depression
First Known Use of L-TRYPTOPHAN
Medical Definition of L–TRYPTOPHAN
: the levorotatory form of tryptophan that is a precursor of serotonin and was formerly used in some health food preparations in the belief that it promoted sleep and relieved depression—see eosinophilia-myalgia syndrome
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