NOW® Magnesium & Potassium Aspartate features two minerals that are ubiquitous throughout the body and play fundamental roles in cell and tissue health. They are especially critical for the maintenance of healthy heart and vascular function, the proper transmission of nerve impulses and the contraction of muscle. Taurine also helps to support neuromuscular and cardiovascular health through its role in the regulation of normal electrolyte and neurotransmitter balance.