5-HTP encourages the synthesis of serotonin, an important neurotransmitter involved in the regulation of endocrine and brain activity responsible.* Sleep Support: Serotonin is an important neurotransmitter that is involved in regulating sleep/wake cycles* Appetite Support: 5-HTP has been shown to help moderate appetite and food cravings.* Pure Quality: Our supplements are made with only premium ingredients sourced from trusted suppliers and guided by our nutritional experts, then carefully manufactured and tested to verify their potency and purity. Pure Difference: What makes us different isn't just our process or what goes into our supplements -- what we leave out matters, too. Pure Encapsulations products are FREE FROM wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.