Caffeine and soda can decrease your calcium level. Caffeine increases calcium loss because it's a diuretic. According to the National Osteoporosis Foundation, the phosphates in soda may interfere with calcium absorption. A soda with caffeine hits you from both angles. Medications which reduce bone density include steroids such as prednisone and Flovent.
Hormone replacement does have side effects.
Done properly, exercise has no side effects. Osteoporosis Drug Awaiting approval. Actonel, presently used for Paget's disease, may be the next treatment for Osteoporosis. Risk factors for Osteoporosis Osteoporosis risk factors. 1,000 milligrams per day for all other adults 800-1,200 for children from one year up to 11.