gigi & @meomurian - This has been discussed before, and here is an explanation of why it strontium supplements are not a good idea, especially for anyone on Prolia or another treatment. Strontium deposits itself, replacing calcium in the bone, making bone density tests inaccurate. Strontium is not bone, and its efficacy in reducing fractures is unknown.
https://americanbonehealth.org/medications-bone-health/why-strontium-is-not-advised-for-bone-health/
It should be discussed with your doc before beginning treatment.
Sue