Healthvit Magnesium Glycinate is made up of Magnesium, an essential mineral, and glycine, a non-essential amino acid. It is easily absorbed by your body, likely because it gets carried to your cells bound to the amino acid. It is very important for the normal functioning of cells, nerves, muscles, bones, and heart. Usually, a well-balanced diet provides normal blood levels of Magnesium. Glycine, is a non-essential amino acid which is produced in the liver, it is the smallest and simplest of the amino acids, and is a building block for other amino acids.