Containing a natural balance of the essential minerals needed for optimal absorption and assimilation, Coral Calcium is highly absorbable natural source calcium that also helps to balance pH levels. Naka marine coral calcium contains Calcium as the primary ingredient, and Magnesium, plus Vitamin D & trace minerals with digestive enzymes. May be helpful for those concerned with arthritis, heart disease, osteoporosis, eczema, Alzheimer’s, high cholesterol, indigestion and chronic fatigue syndrome.