What is 5-HTP? Derived from the amino acid l-tryptophan, 5-Hydroxytryptophan (5-HTP) is converted in our bodies into the brain chemical messenger serotonin, a natural neurotransmitter that influences a variety of bodily functions, including sleep, appetite and mood. Why is Healthspan’s better? 5-HTP is a synergistic combination of seven naturally helpful nutrients, formulated by experts for maximum benefit. It is one of our top selling products, receiving a 5-star review rating. Carefully extracted from the seeds of the West African tree Griffonia simplicifolia, our natural source 5-HTP tablets also contain a blend of B vitamins and zinc to help support your psychological and cognitive functions, as well as your energy levels and nervous system. Who is this for? 5-HTP with vitamins and zinc is an ideal vegan supplement to support your brain’s normal function and help deal with the challenges of your daily routine. *Vitamins B6, biotin and niacin contribute to normal psychological function and to the normal functioning of the nervous system. Zinc contributes to normal cognitive function.