2:1 Calcium to Magnesium Ratio Dietary Supplement Bone Support Muscle Function Energy Production Gluten-Free No Artificial Preservatives Potency & Quality Guaranteed An FDA Regulated Facility Calcium and magnesium work closely together to support bone health, muscle function, and natural energy production. Chelated Cal-Mag provides these two minerals in the preferred 2:1 ratio, and their chelated forms promote maximum absorption.