As @windyshores comments, we are all concerned about our bones. That was the reason I first tried tamoxifen. Now I will try the AIs, which are more effective in controlling BC for estrogen + postmenopausal women. First I will see if I can tolerate an AI, then, if I continue with an AI, I will follow my bone scans while doing what I can to maintain my bone density. A woman on another site suggested that her eating 6 dried plums each day was effective during her 5 years on an AI. You bring up important considerations. Our wiggle room is in the choices we finally make at each junction of our treatment.