\"Serotonin is an important chemical that regulates a whole host of body systems, including your sleep cycle. Higher Nature Serotone 5HTP supplements contain the amino acid 5HTP, which is essential for neurotransmitter production and can be found naturally in Griffonia simplicifolia seed, as well as added B vitamins and zinc. Take one at the end of the day to encourage a restful sleep.Supports the production of serotonin.Amino acids sourced from the Griffonia simplicifolia seed.Contains added B vitamins and zinc.Free from valerian.Aids sleep-wake cycle.\"