What is 5-HTP?5-HTP (5-hydroxytryptophan) is a naturally occurring amino acid that creates serotonin. You've most likely heard of serotonin, its a super important neurotransmitter that helps regulate mood, sleep, and appetite. As a supplement, 5-HTP comes from the seeds of an African shrub known as Griffonia simplicifolia.What does 5-HTP do…