US Surgeon General recommends Calcium & Vitamin D to help prevent Osteoporosis! NEW SCIENTIFIC STUDY DATA now reveals that this same important mineral may also significantly promote Colon health as well! To build bone, you need to have enough calcium in your diet. But in spite of calcium-fortified orange juice and the best efforts of the dairy industry, most Americans are calcium deficient. Calcium supplements are a simple way to make sure you're getting enough of this important mineral.