the full name of 5 htp is 5-hydroxytryptophan which is a natural compound that our bodies make from the amino acid tryptophan. 5-htp is converted in the brain into serotonin which acts as a brain chemical messenger.5 htp is a well researched nutrient with over 15 published studies supporting its use. 5 htp tablets are now a top-selling supplement in the usa & its long history of use has shown it to have an excellent safety record.nature’s best insist on the purest grade available extracted from the seeds of a tree called griffonia simplicifolia & not from synthetic versions. each tablet therefore provides 100mg of pure 5-htp a level which matches that used in published studies.twice the strength of many brandsand a great alternative to st john’s wortnatural not synthetic sourceand the purest grade availablea well researched nutrientover 15 published studies.