5-HTP as Therapeutic Supplement,  which is found naturally in certain foods like turkey and cheese, is often sold as an over-the-counter therapeutic supplement. In this case, it is usually sourced from the seeds of the Griffonia Simplicifolia. As an alternative treatment for depression and mood disorders. Its role as an intermediary in the biosynthesis of serotonin indicates that this chemical may indeed be effective in treating these and other serotonin-related disorders