OstroVit - Histidine is an amino acid...
5-HTP (5-hydroxytryptophan) - an intermediate metabolite between the amino acid L-tryptophan and serotonin, obtained from the seeds of an African plant Griffonia simplicifolia.
Puritan's Pride - 5-HTP L-5-Hydroxy-Tryptophan helps increase serotonin levels.
Puritan's Pride - 5-HTP L-5-Hydroxy-Tryptophan contains 5-hydroxytryptophan, derived from an extract of the African Griffonia plant.