If you remember chemistry or biochemistry from high school, the word glycine might ring a bell. If not, read on to answer the question: what is glycine? What is glycine? Glycine is the simplest amino acid. Amino acids are chemical compounds that contain an amino group (NH2) and carboxyl group (-COOH). The chain between is composed of carbon and hydrogen atoms and its length defines the amino acid. Amino acids are the building blocks of all proteins. Amino acids are normally categorised in non-essential (produced by our bodies) and essential (which must be consumed in our diets). Glycine is a non-essential amino acid; however to be more exact it should…