The citrate form provides greater absorption of magnesium. It helps eliminate ammonia from the body, is important for regulating heartbeat, muscle contraction, and neurotransmission. Magnesium citrate also increases the amount of water in the intestines and in the digestive system in general. Magnesium carbonate works in the body, in coordination with calcium, to manage the function of muscle cells. While calcium promotes a form of hardness and rigidity, magnesium carbonate promotes relaxation and smoothness of tissues. Plants and animals need calcium carbonate to form their skeletons and shells. Magnesium oxide, or so-called magnesia, is a form that is not absorbed or is absorbed in very small quantities, so it only serves as an antacid, as it is able to neutralize acids and stimulate intestinal transit. Ingredients: Magnesium oxide, magnesium citrate, magnesium carbonate Dosage: Take 3 capsules daily with water.