For people wanting a more positive state of mind, 5-HTP is a naturally occurring and fast-acting serotonin supplement made from a plant called the Griffonia Simplicifolia. 5-HTP is causes a much more immediate lift in serotonin levels than L-Tryptophan ... And because of this many bio-hackers advise that we take it once in a while - only when we need it. * the highest quality 5-HTP guaranteed: the powder used to make the capsules is third party tested for purity in the usa. 5-HTP is a naturally occurring amino acid used to create the "feel good" neurotransmitter serotonin. It is derived from the Griffonia Simplicifolia plant and then turned into vegetarian capsules in our iso licensed uk facilityNumerous studies have shown that 5-HTP is a fast-acting and effective supplement that can benefit mood, behaviour and cognition. Serotonin production is nutrition-dependent; high protein foods give us the amino acid L-Tryptophan , which is then turned into 5-HTP and then serotonin. People who produce low levels of serotonin levels tend to feel down, stressed and crave chocolate (which contains l-tryptophan).