Strontium
Also known as: strontium chloride, strontium ranelate, strontium citrate, Sr-89, strontium-89
Effective Dosage
No established dose from provided studies
What the Science Says
Strontium is a naturally occurring mineral chemically similar to calcium. In dental research, strontium chloride has been used in desensitizing toothpastes to help reduce tooth sensitivity, though it performed less well than tricalcium phosphate in one clinical trial. A radioactive form called strontium-89 is used medically as an injected radiopharmaceutical to reduce bone pain in cancer patients with bone metastases, though adding it to standard bone-modifying drug therapy showed no significant additional benefit in one small trial. In laboratory and materials science research, strontium is being explored in bone-repair biomaterials, but this work has not translated into proven oral supplement benefits.
What It Doesn't Do
No evidence from these studies that oral strontium supplements build bone density or prevent osteoporosis in healthy adults. Not proven to treat joint pain or arthritis. Strontium supplements are not the same as the prescription drug strontium ranelate — don't confuse them. No evidence it improves heart health, energy, or immunity. The bone-repair research is in lab materials, not human supplement trials.
Evidence-Based Benefits
Strontium has demonstrated some utility in specific medical contexts: as a radiopharmaceutical (Sr-89), it showed modest analgesic potential when combined with zoledronic acid for painful bone metastases in breast cancer, though without significant benefit over zoledronic acid alone (PMID: 36042056). Topically, strontium chloride in toothpaste showed less effectiveness for dentin hypersensitivity relief compared to tricalcium phosphate toothpaste (PMID: 37002263). In experimental biomaterials research, strontium ions incorporated into scaffolds and nanoparticles show preclinical promise for bone and cartilage repair by modulating osteoblast/osteoclast activity (PMID: 41898502, 41934822, 41901209).
Weak EvidenceEffective at: No established dose from provided studies for oral supplementation
Source: auto-research
Absorption & Bioavailability
Unknown for oral supplement forms based on provided studies. Strontium chloride is used topically in dental products. Sr-89 is administered by injection in medical settings.
Red Flags to Watch For
- Strontium supplements are not FDA-approved drugs — the 422 registered products on NIH DSLD are sold without proof of efficacy for bone health
- Radioactive strontium-89 used in cancer treatment is a prescription radiopharmaceutical — it is not the same as over-the-counter strontium supplements
- Strontium can displace calcium in bone, which may interfere with bone density measurements (DEXA scans), potentially giving falsely reassuring results
- No human clinical trials in the provided data support oral strontium supplementation for any health outcome
- Strontium contamination in groundwater near oil and gas operations is flagged as a potential environmental health concern
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06