Vitamin D is needed for the absorption of calcium. Our skins make vitamin D from sunlight. Avoiding direct sun exposure and using loads of sun blocker because of the fear of skin cancer increases our risk of vitamin D deficiency. Five to 10 minutes of sun exposure preferably of the upper chest or back (hands, arms legs and face are better than nothing), two to three times a week, together with supplements of vitamin D may counter that deficiency. Being inactive predisposes us to a higher risk of bone density loss. A regular combination of two types of exercise for 20-30 minutes a day and up to six days a week, is recommended. Weight-bearing exercises build bone and include brisk walking, jogging and dancing (non-impact exercises like swimming and cycling don’t build bone). Resistance training, also called strength or weight training, builds the strength, endurance and size of skeletal muscles and can maintain or improve, bone mineral density.