Strontium ranelate, the prescription form of strontium that is not sold in the US, was restricted for awhile due to cardiovascular safety concerns. At that time some US supplement companies (like Doctor's Best) stopped making it. I believe it is now allowed in the UK (dangers disproven?) and is used for severe cases. https://en.wikipedia.org/wiki/Strontium_ranelate

The problem with strontium is that it distorts DEXA scan results. Strontium is heavier than calcium and when it replaces calcium in the bones, the DEXA reads it as denser.You may or may not care about that.

The algaecal dose is 680mg which is considered to be the therapeutic dose for osteoporosis.

After Tymlos, if I cannot tolerate Reclast, I may turn to strontium myself though I have some concerns. I was surprised that Keith McCormick did not recommend it though.

I too had a very difficult time finding a review by an independent source.

Here are the most recent studies about treating osteoporosis that I have been following:
— Osteoporosis: A Review of Treatment Options
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5768298/
— Patient education: Osteoporosis prevention and treatment (Beyond the Basics) — This one has a lot of reference links at the bottom on where to get more information.
https://www.uptodate.com/contents/osteoporosis-prevention-and-treatment-beyond-the-basics/print
- And one recent independent article about strontium supplements, pointing out that these are not without health risks:
https://americanbonehealth.org/medications-bone-health/why-strontium-is-not-advised-for-bone-health/
The last one was especially interesting to me, a "research nerd" because it specifically said the various forms of strontium are chemically the same, meaning the risks and benefits are similar. This confirmed what two doctors have told me - just because strontium is natural, and we get some from our food, does not mean it is safe or effective to take 100 times as much as a supplement.

Will you let us know what you think after you read some of these articles?
Sue

From what I understand, the studies posted on the Algaecal website were conducted by the company which gives me pause. Strontium can skew results on your dexa scan due to the fact that it is heavier than calcium giving the appearance that your bones have increased in density. I don't know whether there is enough strontium in their supplements to have this results. Strontium is a non-essential mineral to the human body whereas calcium is absolutely essential. Until there is further research determining the safety and efficacy of strontium citrate, I stick with calcium which I know the body needs.

I have read medical reviews that are against strontium citrate. It makes bone density appear better because it is an element that weighs more than calcium. You might be interested in reading this:
https://www.ironwoodcrc.com/top-5-supplements-for-bone-health/