Calcium. Magnesium. Vitamin D3. Zinc and 4 supporting nutrients. A complete formula to help maintain strong bones for all men and women of all ages. The UK's No. 1 calcium formula. To help keep your bones strong and healthy, you must receive enough of certain nutrients in you diet every day. Osteocare has been scientifically developed on the very latest research to help maintain strong bones and teeth. Its natural source mineral calcium is the most concentrated form of calcium available.