History and Usage: 5-HTP is a precursor to serotonin, a brain chemical responsible for regulating mood, appetite, behavior, and sleep and may help elevating mood, encouraging relaxation, controlling appetite, promoting sleep and may prove beneficial in the treatment of depression, obesity, insomnia and headaches (migraine). Websites for Further Research:

http://en.wikipedia.org/wiki/Amino_acid

http://www.biology.arizona.edu/biochemistry/p...

http://www.answers.com/topic/amino-acid#after_ad1

http://web.indstate.edu/thcme/mwking/aminoaci...