Natural extract from Griffonia Seeds5-HTP, short for 5-hydroxytryptophan, is a derivative of tryptophan, an amino acid that is present in high protein foods such as meat and dairy productsEach tablet provides a full 100mg of 5-HTPA natural source, extracted from the seeds of Griffonia simplicifolia. The daily intake recommendations for this product reflect the levels of 5-HTP used in most of the clinical studies. Lamberts® takes great care to ensure the purity of the 5-HTP used in this product which is extracted from a natural source, the seeds of a plant called Griffonia. The extract from this plant is now one of the most extensively used supplements worldwide and is particularly popular in the USA where it has a long history of use. Tablets are manufactured in the UK to pharmaceutical GMP standards.