Doctor's best 5-htp dietary supplement is made from 5-htp derived from the seeds of the griffonia simplificolia plant to help promote healthy sleep. 5-htp is a naturally occurring tryptophan metabolite that is converted to serotonin, which is a neurotransmitter found at the junctions between neurons. This supplement comes in a 60-count bottle and is designed to acts as a brain antioxidant. Doctor's best 5-htp also helps encourage relaxation and calm.