Calcium is vital for the formation of strong bones and teeth and for the maintenance of healthy gums. It is also important in the lowering of cholesterol levels and helps prevent cardiovascular disease. It is needed for healthy muscle contraction, nerve transmission, blood-clotting and cell-membrane function. This crucial mineral also helps prevent bone loss associated with osteoporosis. Signs of calcium deficiency: Muscle cramping, irritability, hypertension, insomnia, rheumatoid arthritis and rickets
