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Jarrow Formulas 5-HTP Description. •5-Hydroxytryptophan •Supports Serotonin Synthesis •Gluten Free •Vegan Jarrow Formulas 5-HTP (5-Hydroxytryptophan) is an extract of Griffonia simplicifolia seeds from coastal West Africa. Purity is assured by HPLC. 5-HTP is the direct metabolic precursor of serotonin and is important for the production of melatonin.
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