Magnesium is an important mineral essential for good health, contributing to electrolyte balance, energy metabolism, neuro transmission and proper muscle function and protein synthesis. ZipVit ZV Magnesium tablets provide an easy to take concentrated tablet that is a particularly popular supplement for cyclists and triathletes. Key Features: 90 tablets. Ingredients: Magnesium Oxide, Calcium Carbonate, Microcrystalline Cellulose, Magnesium Stearate Each Tablet Contains: Magnesium 500mg.