I take Citracal with D. Cirtracal is calcium citrate and is more easily absorbed than Tums or calcium carbonate. Plus, you need vitamin D to help the calcium be absorbed. My doctor has me taking two a day...one in the morning and one in the evening.
I'm confused too because I didn't know that bone density could be seen from a regular x-ray. I get a DEXA scan every two years. If you are in menopause, you should have a bone scan.
Sherrine