AOR Strontium Support II - A trace mineral which concentrates in the skeletal system, where it supports the function of osteoblasts (the cells which form new bone) while reducing the differentiation and activity of osteoclasts (the cells which resorb old bone). Strontium Support II is an excellent addition to calcium supplementation for those with osteoporosis or osteopenia, post-menopausal women or those at an increased risk of bone fractures.