1. In building bone, calcium has an indispensable assistant: vitamin D.

2. Vitamin D helps the body absorb calcium.

3. Increasing vitamin D can help prevent osteoporosis.

4. A small amount of sun exposure can help the body manufacture its own vitamin D

5. Five to 30 minutes of sunlight between 10 a.m. and 3 p.m. twice a week to your face, arms, legs, or back without sunscreen will enable you to make enough of the vitamin.

6. People with fair skin that burns easily should protect themselves from skin cancer by limiting sun exposure to 10 minutes or less.

7. Food and sun exposure should suffice, but if not, get 2,000 IU of vitamin D daily from a supplement.