Magnesium is a poly-active major essential mineral. Magnesium helps to regulate calcium transport and absorption. By stimulating the secretion of the hormone calcitonin, it aids the influx of calcium into bone and promotes optimal bone mineralization. Magnesium also works with ATP to release the energy needed to fuel most reactions in the body. It supports healthy nerve and muscle function. This fIngredients: Supplement Facts Serving Size: 4 Tablets Amount Per Serving %DV Magnesium(as magnesium glycinate chelate, magnesium oxide) 400 mg 95% Ingredients: Microcrystalline Cellulose, Vegetable Cellulose, Silica, Vegetable Magnesium Stearate, Titanium Dioxide (Color), Vegetable Glycerin. * Daily Value (DV) not established