Strontium citrate, fractures and lack of research

Posted by pami @pami, Apr 15, 2024

I am looking to see if there are any studies done that show a reduced chance of fracture from using Strontium citrate (Algaecal) as opposed to calcium. Everything I have read only mentions increase of density using it. Does anyone have doctor input or a study showing an decrease in bone fractures?

***Director's Note:***
There’s not enough clinical research to know if strontium citrate effectively prevents or treats osteoporosis. Mayo Clinic does not recomend its use. Clinically researched osteoporosis medications have demonstrated fracture prevention benefit with less risk.  

The FDA doesn’t regulate supplements in the same way as prescription drugs, so it's not possible to know if if they are safe or work well or even how much of the main ingredient they contain.

If you wish to take a strontium supplement, it is advised to discuss with your doctor. 

All information shared by members on the Mayo Clinic Connect is for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your health. Never disregard professional medical advice or delay in seeking it because of something you have read on the community.

Interested in more discussions like this? Go to the Osteoporosis & Bone Health Support Group.

Profile picture for psmnonna @psmnonna

@drsuefowler
I started a reply, but then lost it somehow, so apologies if something appears twice.
I have read that no one is exactly sure how Strontium works. It appears to fill in where bones are lacking, and this does improve dexa numbers....but what does that really mean for strength and flexibility? Bones have to remain flexible enough to take stresses without cracking, splintering and breaking. In my head I compare it to tires on the car. An old tire with a patch is fine and functional for a while, but a new tire has much more strength and will last a long time compared to the old one that has been patched. Since I'm taking Tymlos, I'm supposed to be building new tires...I mean bones (time will tell on that one).

I would love to have a REMS test, but none are offered in my area. I am seeing a new endo at a university who specialized on osteoporosis. I will have to travel to see her but am ok with that now. Hopefully the university has REMS on their machines.

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@psnmonna,
I'm glad you found a specialist at a university. I have seen 3 endocrinologists near where I live, but feel like I know more than they do. My regular endo even said I do. I am tired of doing my own doctoring!

I think that part of the trouble with bone markers is that they are difficult to order. My doctors kept messing up trying to order them, especially P1NP. My insurance covers them both and repeatedly, when ordered correctly.

I too am taking Tymlos. I am considering going back on Strontium. My regular endo thinks I should take that and raloxifene. The Strontium is just in case it helps. The Raloxifene is to lower my CTX which is up to 1414 on Tymlos.

Good luck with your new endocrinologist!

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@psmnonna I have found this Mayo site to be more helpful than inspire, over several years, for many health issues. But it always helps to see different perspectives.

Doctors are important. It can be a long wait to get a good one and access is hard. But we need to find one who works well for us. None of us wants to know more than our doctors!

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Profile picture for psmnonna @psmnonna

@windyshores thank you for your informative answer! I have read some about how strontium replaces calcium, which makes sense that it would bolster up a dexa score. But is that really better or does that really improve bone strength because strontium is denser?

Unfortunately I didn't know about bone markers before I started Tymlos so never had them checked. I've seen 2 endos and 1 rheumatologist over the past year and none of them recommend or use them. I've found a new endo I'm seeing in Jan for my yearly check up who specializes in osteoporosis only, so I'm hopeful that she is more open minded. The others were very conservative and only interested in the pharmaceutical route.

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What is more in keeping with the research is that strontium replaces osteoporic gaps in your bones and then allows calcium to adhere and bone grows.
Rems and TBS with DEXA have proven that strontium does improve bone density and bone quality.

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Profile picture for psmnonna @psmnonna

I'm on month 11 of Tymlos and although I'm having some side effects that are manageable, I'm getting tired of being tired all the time. I started looking into strontium and now I'm very interested in anyone who has had success/experience with this supplement. How much per day? Does it interact with Tymlos or any other supplements for that matter? What is the best way to add it to your diet? I take a daily vitamin, fish oil, K2, D3 and magnesium. I eat enough calcium per day to not take an extra supplement, also exercise, walk, bike, weight training, yoga, pilates. No fractures. Last dexa score was -3.6 in the spine and in the -1s in hips. Based on the spine my endo said Tymlos was the cure all, be all. I am not due for another dexa until Jan 2025 and that will be a full year of Tymlos, so hoping it is doing something. Thanks one and all for your input!

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2mcchesney I think it is important to mention that strontium at that level (680mg) is not actually "natural." That is not to say it is not helpful. Not sure how much is in groundwater that you cited and of course any website should be viewed with skepticism:
https://saveourbones.com/strontium-science-based-facts-vs-fiction/.
Excerpted: "A typical strontium citrate supplement dosage (around 680mg) is 170 to 340 times the naturally occurring strontium levels in the average person’s daily diet."

My concern is that it makes bones look denser and healthier on DEXA because strontium is denser than calcium and replaces it. So once we take it, the DEXA is likely skewed unless there is a radiologist skilled in interpreting.

Another concern is that the European medical board banned strontium ranelate for a time due to cardiovascular risks. Noone seems to know if strontium citrate poses the same risks. It is back on the market in Europe but only as a last resort for people who cannot tolerate anything else. In the US, supplements are not regulated so we need to be careful what brand we use.

I took it briefly 15 years ago and would consider it after treatment with meds for maintenance. I have been told strontium is not strong enough to deal with osteoporosis that is not mild. It would be dangerous for me to rely on it but those with osteopenia or very mild osteoporosis could try it. Just have to know the DEXA may look better than it is.

ps another issue is how long before strontium leaves the bones...not sure, need to research

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Profile picture for drsuefowler @drsuefowler

@psnmonna,
I'm glad you found a specialist at a university. I have seen 3 endocrinologists near where I live, but feel like I know more than they do. My regular endo even said I do. I am tired of doing my own doctoring!

I think that part of the trouble with bone markers is that they are difficult to order. My doctors kept messing up trying to order them, especially P1NP. My insurance covers them both and repeatedly, when ordered correctly.

I too am taking Tymlos. I am considering going back on Strontium. My regular endo thinks I should take that and raloxifene. The Strontium is just in case it helps. The Raloxifene is to lower my CTX which is up to 1414 on Tymlos.

Good luck with your new endocrinologist!

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The raloxifene is a synthetic form of hormone which does not match chemically the hormone which is produced in the human body.
Bioidentical hormones used topically match your bodies' chemical hormones.
Also, DHEA supplements or creams or pregnelone supplements work at the adrenal level to up your hormones naturally.
I would not take any hormone with out a good hormone specialist monitoring and the results from a good hormone work up, saliva test or serum base line test.
A compounding pharmacist will have the names of hormone drs in your area with which they work.

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Profile picture for windyshores @windyshores

2mcchesney I think it is important to mention that strontium at that level (680mg) is not actually "natural." That is not to say it is not helpful. Not sure how much is in groundwater that you cited and of course any website should be viewed with skepticism:
https://saveourbones.com/strontium-science-based-facts-vs-fiction/.
Excerpted: "A typical strontium citrate supplement dosage (around 680mg) is 170 to 340 times the naturally occurring strontium levels in the average person’s daily diet."

My concern is that it makes bones look denser and healthier on DEXA because strontium is denser than calcium and replaces it. So once we take it, the DEXA is likely skewed unless there is a radiologist skilled in interpreting.

Another concern is that the European medical board banned strontium ranelate for a time due to cardiovascular risks. Noone seems to know if strontium citrate poses the same risks. It is back on the market in Europe but only as a last resort for people who cannot tolerate anything else. In the US, supplements are not regulated so we need to be careful what brand we use.

I took it briefly 15 years ago and would consider it after treatment with meds for maintenance. I have been told strontium is not strong enough to deal with osteoporosis that is not mild. It would be dangerous for me to rely on it but those with osteopenia or very mild osteoporosis could try it. Just have to know the DEXA may look better than it is.

ps another issue is how long before strontium leaves the bones...not sure, need to research

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Crossposted. @mcchesney please read my last post carefully. I always try to mention the ranelate when talking about Europe.

I am not opposed to strontium. But there are issues. Yes it improved density on the DEXA but it LOOKS denser because it is heavier. There are other issues too. I have used it and plan on considering it in the future but with eyes wide open. My case was too severe to rely on it. Good luck. (McCormick does not recommend in "Great Bones" but we need more research.)

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@kathleen1324,
I am still off Strontium. Since I have too much calcium in my urine, I have been afraid to take it. I thought that since it is so similar to calcium, it could increase my chances of a kidney stone. I know in my own experience that it improved my DEXA scores. There was a study cited on this forum that showed that Strontium helps some. Are you able to cite the research you are referring to or tell us how to find it? Thanks so much for posting about this.

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Profile picture for mcchesney @kathleen1314

The raloxifene is a synthetic form of hormone which does not match chemically the hormone which is produced in the human body.
Bioidentical hormones used topically match your bodies' chemical hormones.
Also, DHEA supplements or creams or pregnelone supplements work at the adrenal level to up your hormones naturally.
I would not take any hormone with out a good hormone specialist monitoring and the results from a good hormone work up, saliva test or serum base line test.
A compounding pharmacist will have the names of hormone drs in your area with which they work.

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@kathleen1324,
I have been trying to find a doctor who will prescribe estrogen patches for me, but no luck so far. I have not taken the Raloxifene for fear of blood clots. Although my Endo told me that it was safer than estrogen, I'm not sure that I believe him. Thanks for your suggestions. I will check with the compounding pharmacists in my area for a good hormone specialist.

REPLY
Profile picture for drsuefowler @drsuefowler

@kathleen1324,
I am still off Strontium. Since I have too much calcium in my urine, I have been afraid to take it. I thought that since it is so similar to calcium, it could increase my chances of a kidney stone. I know in my own experience that it improved my DEXA scores. There was a study cited on this forum that showed that Strontium helps some. Are you able to cite the research you are referring to or tell us how to find it? Thanks so much for posting about this.

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Firstly, strontium has never been tied to kidney stones, but maybe there is a first.
I know that vit k is frequently used to route calcium to the bones rather than the blood. But since I don't know your medical history then I just can't say anything about calcium in your urine. You need a series of tests from an osteoporosis endocrinologist to be sure.
I just was making the point that any time you don't give your body the nutients which it needs to grow bone be it calcium or any other supplement that your bones will lose density. It is not unique to strontium.
I assume that you are referring to the TBS with DEXA research when you ask for research
which I referred to"?
Here is a link to a posting on TBS with DEXA that rates strontium users in the top 3 for density and bone quality.
https://www.inspire.com/groups/bone-health-and-osteoporosis/discussion/tbs-dexa-and-strontium/reply/7712668597918129698/
Here is another posting on a compilation of strontium research and how it works to prevent fractures and improve density and bone quality.
https://www.inspire.com/groups/bone-health-and-osteoporosis/discussion/2020-a-review-of-latest-insights-into-the-mechanism-of-action-by-strontium-/

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Profile picture for drsuefowler @drsuefowler

@kathleen1324,
I have been trying to find a doctor who will prescribe estrogen patches for me, but no luck so far. I have not taken the Raloxifene for fear of blood clots. Although my Endo told me that it was safer than estrogen, I'm not sure that I believe him. Thanks for your suggestions. I will check with the compounding pharmacists in my area for a good hormone specialist.

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I always assume that something that matches chemically what my body makes is always safer.
Sounds like Raloxifene is trying to be both estrogen and progesterone in your body; seems easier and safer to just use a bioidentical estrogen and progesterone. And yes it is always safer to take progesterone with an estrogen.
You can call your local compounding pharmacist and ask for a hormone expert who prescribes topical bioidentical hormones.

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