From Holland & Barrett
What is it? Holland & Barrett Griffonia Seed Extract contains naturally occurring 5-HTP (5-Hydroxytryptophan). 5-HTP is an amino acid which cannot be sourced from the diet. Naturally Occurring 5-HTP Suitable For Vegetarian and Vegan Diets What Are the Benefits of This Supplement? 5-HTP (5-Hydroxytryptophan) cannot be sourced from the diet, it is made by the body from the Amino Acid: Tryptophan.