High potency magnesium citrate that provides higher magnesium absorption. Magnesium is a cofactor in many enzyme systems, especially those related to energy production and protein synthesis. It also helps eliminate ammonia from the body, is important for regulating heart rate, muscle contraction and neurotransmission. Low magnesium levels have been found in people with heart disease. Particularly useful in the elderly and in people with low stomach acidity. Suitable for vegans.