Price: (as of – Details) What is 5-HTP?5-HTP is a precursor to the neurotransmitter serotonin, which plays a role in many important functions, including sleep, appetite, memory, learning, mood, libido, digestion and endocrine regulation. Stress and age can diminish natural serotonin levels, leading to increased risk of anxiety, depression, and insomnia. Our 200mg 5-HTP Plus