The Magnesium in this product is reacted with whole rice concentrate rather than ordinary soy, yeast, or milk proteins which are commonly used to chelate minerals. The special rice used by Solaray is approximately seven times higher in amino acid content than ordinary rice and has a better essential amino acid profile than soy. Directions: Use only as directed. Take one vegetarian capsule daily with a meal or glass of water. Store in a cool, dry place.