@gailb @artscaping @sue225 @lioness and anyone else who I may have missed who is searching for answers about osteoporosis and the best course to take. I am reading a Harvard Health Publication about Osteoporosis and finding it very helpful (this is something that you do have to purchase), but there are also great answers here to many of the questions:
https://www.health.harvard.edu/topics/osteoporosis
and here from Mayo:
https://shareddecisions.mayoclinic.org/decision-aid-information/decision-aids-for-chronic-disease/other-decision-aids/
https://www.mayoclinic.org/diseases-conditions/osteoporosis/symptoms-causes/syc-20351968
It sure is not an easy decision but it sounds to me as if the problems from the medications are fewer than the potential problems of trying to battle it with diet and exercise. Diet and exercise are great preventative measures, in fact I have purchased a book about it for my daughter who is in her late 30s. Bones start getting less dense at around 40 so the best time to start is early. I wish I had realized that myself, but part of my problem is that I have to be on prednisone which is bad for bones. From what I have been able to determine, exercise and diet may help to maintain your current bone numbers but rarely improve them.
JK