Indications and Usage 5-HTP ( the common name for the compound 5-hydroxytryptophan) is a derivative of the amino acid tryptophan. A mood-enhancing chemical, 5-HTP has attracted a good deal of attention lately because of its ability to increase pain tolerance, induce sleep, and affect how hunger is perceived. Unlike many other supplements ( and drugs) that have molecules too large to pass from the bloodstream into the brain, molecules of 5-HTP are small enough to do so. Once in the brain, they' re converted into an important nervous system chemical, or neurotransmitter, called serotonin. In 1994, 5-HTP was introduced in the U.S.; 5-HTP is thought to pose significantly less risk of contamination than L-tryptophan. Europeans have been taking 5-HTP for decades to treat insomnia and depression. Package 1kg/ bag, 5kg/ bag, 25kg/ drum, double layers plastic bags inside. Storage Situation Stored in a cool and dry well-closed container. Keep away from moisture and strong light/ heat.