The FDA has released a final, official ruling that approves the claim that vitamin D can be add to calcium supplements to reduce the risk of osteoporosis, which is above and beyond their previous labeling stance that calcium only could be labeled as such. The Department of Health and Human Service news release also stated that the FDA would eliminate the requirement list sex, race, and age as specific risk factors for the development of osteoporosis.
The benefits of a combination of vitamin D and calcium have long been present in a variety of scientific studies, but it is only through a vigorous and thorough process that the FDA allows such claims to be made on the products themselves. With the FDA's approval, all consumers may be sure that it truly is the case that calcium with vitamin D does help to prevent osteoporosis. You can view the FDA's full claim release here as a pdf.