What is it?PE Nutrition L-Tyrosine is a non-essential amino acid which means it can be produced by the body as well as obtained through the diet. Contains 500mg of L-Tyrosine Suitable Food Supplement for Vegetarians and Vegans Not Intended for Use By Persons Under The Age Of 18 What Are the Benefits of This Supplement? Amino Acids are the building blocks of protein. Protein makes up the structure of all cells and tissues in the body, including muscle tissue, tendons, internal organs, skin, hair and nails. There are 20 amino acids, 12 of these can be made by the body and are referred to as non-essential whilst the other 8 are known as essential and can only be supplied by the diet. Packaging colour and size may vary but product contents are as described.