I also had breast cancer that was fed by estrogen. One in 8 women has breast cancer and of those cancers. 70% are fed by estrogen, I have read.

Reading about weight lifting makes me nervous! I found tai chi helpful but I don't even lift two seltzer bottles. Fractures make lifting tough.

I found one very safe food that has been proven with randomized, controlled clinical studies to build bone and reduce bone loss in post menopausal women: 50 grams of dried plums (prunes) per day. That’s about 4-5 per day. You can find the studies at National Institutes of Health by just googling prune therapy + pubmed (short for pubmed). If my memory serves me right the studies compared it to fosamax or HRT and said it had comparable benefit. If you can’t find the research let me know and I’ll check my files for the link. If you decide to add prunes, I suggest you start slowly 1/day for a week or so then add another, etc. That way your gastro system has time to adjust. I take my “dose” of prunes in the am with food and I find that works best for me.

You may also want to check out a prescription food called FosteumPlus. The main ingredient is genistein, a type of soy. My sister’s gynecologist recommended it for osteoporosis and I have been on it now for about a year and a half. It too has proven clinical results in randomized controlled studies. Not sure about whether it would work with your breast cancer history though.

One more idea that I don’t know much about as I am just learning about it now. If you decide you must go on an osteoporosis medication for your condition, check into Evista (raloxifene). According to Mayo website on breast health they recommend that drug for women who have osteoporosis and need/want to reduce breast cancer after some precancerous conditions. When I looked it up it seemed to have fewer incidences of jaw necrosis than the other meds. Good luck!