5-HTP ( 5-Hydroxytryptophan) is a compound produced in the body from the amino acid tryptophan. It is a precursor to the neurotransmitter serotonin and the hormone melatonin. 5-HTP supplements have....
xi' an erica botanical product co., ltd is one of the leading manufacture in China specializing in developing, producing and handling raw pharmaceutical materials, herbal extract and clear liquid....