Supports Bone Health With Trace Minerals and Vitamin D A Dietary Supplement Minerals Family Owned Since 1968 Quality Assured GMP NOW Cal-Mag Caps contains the minerals that are essential for bone health. In addition to Calcium and Magnesium, Cal-Mag Caps provide chelated, highly absorbable forms of Zinc, Copper and Manganese, three trace minerals known to support healthy bone metabolism. Vitamin D has also included to support Calcium metabolism.