Dr. Grey AI

Strontium

Strontium is a mineral chemically similar to calcium that incorporates into bone. Strontium ranelate (prescription drug in Europe, NOT available in US) reduces fractures in osteoporosis. OTC strontium citrate is NOT equivalent - different form, no proven fracture reduction. MAJOR CONCERN: Strontium ranelate increases VTE (blood clot) risk by 50% and cardiovascular events - now restricted in Europe. Strontium also artificially inflates DEXA bone density readings by 10-15% (heavier element), making results unreliable. OTC strontium supplements are largely unproven for bone health.

Quick Answer

What it is

Strontium is a mineral chemically similar to calcium that incorporates into bone. Strontium ranelate (prescription drug in Europe, NOT available in US) reduces fractures in osteoporosis.

Key findings

  • Grade A: Fracture Risk
  • Grade B: Bone Mineral Density
  • Grade B: Venous Thromboembolism Risk

Safety

  • MAJOR CONCERN: Strontium ranelate increases VTE (blood clot) risk by 50% and cardiovascular events - now restricted in Europe.
  • Pooled analysis of strontium ranelate RCTs revealed a ~50% increased risk of venous thromboembolism (deep vein thrombosis and pulmonary embolism), contributing to European Medicines Agency restrictions in 2014.
  • Post-marketing surveillance and pooled RCT analyses of strontium ranelate identified increased risk of myocardial infarction and cardiovascular events, leading to contraindication in patients with cardiovascular disease and restriction by the European Medicines Agency in 2014.
ℹ️ Quick Facts: Strontium

Quick Facts: Strontium

  • Best Evidence:Grade A
  • Conditions Studied:2
  • Research Outcomes:6
  • Grade A Findings:1
  • Grade B Findings:3
  • Key Effect:Bone Health
Outcomes by grade:
A1
B3
C0
D2
2 conditions · 6 outcomes

Detailed Outcomes

|
A
Fracture Risk
Multiple large RCTs (SOTI, TROPOS) demonstrated strontium ranelate reduced vertebral fractures by ~40% and non-vertebral fractures in postmenopausal women with osteoporosis. This applies only to the prescription ranelate form, which was restricted in Europe in 2014 due to cardiovascular safety concerns; OTC strontium citrate has not been tested for fracture endpoints.
moderate↑Worsens
B
Bone Mineral Density
RCTs of strontium ranelate showed significant increases in DEXA-measured bone mineral density in postmenopausal women. However, 10-15% of the measured increase is artifact due to strontium's higher atomic mass inflating DEXA readings. An animal study (PMID:38612883) comparing ranelate, citrate, and chloride forms in ovariectomized mice found all forms improved bone mineral density.
moderate↑Improves
D
Bone Microarchitecture
A comparative animal study (PMID:38612883) in ovariectomized female mice found that strontium ranelate, citrate, and chloride all improved bone morphology and microarchitecture, suggesting potential benefits across strontium forms in preclinical models. Human data for non-ranelate forms is lacking.
moderate↑Improves
B
Venous Thromboembolism Risk
Pooled analysis of strontium ranelate RCTs revealed a ~50% increased risk of venous thromboembolism (deep vein thrombosis and pulmonary embolism), contributing to European Medicines Agency restrictions in 2014. This is a significant safety concern observed across multiple large trials.
moderate↑Worsens
B
Cardiovascular Event Risk
Post-marketing surveillance and pooled RCT analyses of strontium ranelate identified increased risk of myocardial infarction and cardiovascular events, leading to contraindication in patients with cardiovascular disease and restriction by the European Medicines Agency in 2014.
moderate↑Worsens
D
Tooth Sensitivity
Strontium chloride was historically used in desensitizing toothpastes for tooth sensitivity but has been largely replaced by potassium nitrate in the US market. Limited modern clinical evidence supports this application.
small↓Worsens

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