NOW Magnesium Glycinate offers support for a healthy nervous system. This dietary supplement features a highly absorbable form of magnesium to help support healthy muscle, nerve, and heart functions. Magnesium glycinate utilizes magnesium bound to the amino acid glycine, which facilitates intestinal absorption. Magnesium is a mineral that is critical for energy production and metabolism. It comes in a bottle containing 180 tablets and is suitable for vegetarians and vegans.