Nature's Blend Amino Acid Chelate of Elemental Magnesium delivers 300 mg of chelated magnesium for optimum absorption and assimilation in your body. Chelation is the result of minerals becoming chemically bound to amino acids in a very specific manner. Chelation occurs naturally during the digestive process to facilitate transport of minerals across the intestinal wall so that they may be utilized throughout the body. Amino acids are not the only "chelators" available, but they are ideal for minerals like magnesium.