Complete Calcium & Magnesium 1:1 contains only the finest quality ingredients. A unique blend of calcium citrate, calcium malate, and a specially precipitated calcium carbonate was selected for maximum absorption.† We combined magnesium, nutritional enhancers including vitamins C & D, boron, potassium, grapefruit, horsetail, and ConcenTrace®, a complex of over 72 ionic trace minerals and elements to supercharge all of the nutrients to help support the overall absorption and effectiveness of this vegetarian dietary supplement.†