Sunlight protection factor. The strength depends on your underlying skin color, the time in the sun and the intensity of the sun. If you want to prevent a burn, I'd use a stronger SPF like 10 or 14 unless you are dark or partially suntanned. The sun in Mexico is intense. It gets worse as you approach the equator.
Vitamin D is necessary for the formation and maintenance of proper bone structure.
A lack of Vitamin D leads to osteomalacia - called Rickets in developing children. A deficiency of Vitamin D will not lead to osteoporosis. However, the final result is similar - weak bones that fracture easily. This can be easily corrected by taking a multivitamin with Vitamin D or by drinking milk products which have Vitamin D added. Back to Drug InfoNet Home Page.