I have been treated with bisphosphanates, forteo, prolia and I had 11 non-traumatic spontaneous vertebral compression fractures during treatment. I now take 680 mg strontium citrate without side effects and the fractures have stopped. Do not take it within 2 hours of ingesting calcium — so I take it at bedtime. My teeth are really strong and it feels like my bones are too. Most people who take strontium citrate report their fractures STOP. They won't do any studies but the END OF FRACTURES SAYS IT ALL!
IT was a 9 year nightmare until I started the strontium citrate. Good luck to all of you.