5-HTP (5-hydroxytryptophan) is necessary for regulating mood & sleep. A natural alternative to prescription anti-depressants, it is a precursor to the neurotransmitter serotinin and so can be used for anxiety, panic attacks and stress. Studies show that -HTP can be used to treat depression, sleep issues and anxiety without the side effects of prescription drugs. Taking 5-HTP together with GABA can significantly improve sleep quality and duration. 5-HTP can also be used for weight loss. 60 capsules.