5-HTP 100MGCompare to 5 HTP by Purely Integrative The precursor to serotonin, our 5 hydroxytryptophan is extracted naturally from the seed of the African plant Griffonia simplicifolia. 5 HTP has been shown to support patients with mild mood changes, occasional restless sleep, and periodic, mild anxiety. Warnings If you have a medical condition, are pregnant, lactating, or trying to conceive, are under the age of 18, or are taking medications (especially SSRIs,