5HTP is the building block to your feel-good chemical messenger; serotonin (5-HT). Serotonin plays a vital role in your biochemistry because it helps to regulate mood. At night serotonin is converted into your sleep hormone melatonin to aid sleep. our 5-htp 100mg tablets is extracted and isolated from Ghanian Griffonia Simplicifolia seeds. 99% of the tablet is comprised of 5-htp making it the smallest, nutrient-dense tablet available.