Surbex® Calcium Plus Tabgels are more than just a calcium supplement. This comprehensive formula also contains additional fortifying nutrients important for healthy bone formation such as magnesium, vitamin D, boron, zinc, manganese and copper. Calcium is an essential mineral for maintaining good bone health. Magnesium is an important element for metabolism of calcium in bone. Boron plays a key role in converting vitamin D into its active form. Vitamin D is necessary for absorption of calcium and its incorporation into bones. Zinc, manganese and copper are the important co-factors in the growth and maintenance of strong bones. Totally, constant use results in stronger and healthier bones.