You've just been diagnosed with osteoporosis and you aren't sure what other tests to have besides the DXA. It's a good idea to have blood and urine tests to check for mineral and vitamin metabolism problems, among others, and to check for secondary medical causes of bone loss and medication causes as well.
Here's a list of tests you can have your doctor order if you want to look into the various causes of osteoporosis besides the primary causes, like hormone depletion from menopause,...
