Thanks for posting this article. The study was very small (81 levothyroxine users and 364 nonusers) so more research is needed. Also, it could be the thyroid condition itself causing the bone loss and not Levothyroxine. This is of concern to me, since I had my thyroid removed and have taken this medication for many years, and I have severe osteoporosis. Not taking the thyroid med is not an option for people who require it, but users should work with their doctors to take the lowest possible dose.