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CALCIUM/STRONTIUM HYDROXYAPATITE

88

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A synthetic inorganic mineral compound similar to natural bone mineral, used primarily in oral care products to help remineralize tooth enamel.

Calcium/Strontium Hydroxyapatite is synthesized by neutralizing aqueous suspensions of calcium hydroxide and strontium hydroxide with phosphoric acid, producing a crystalline hydroxyapatite structure. Strontium is incorporated into the apatite lattice and is used in oral care for its demonstrated ability to occlude dentin tubules and reduce sensitivity. This ingredient is not restricted under EU Regulation 1223/2009 and is considered safe for use in oral care cosmetic products. The systemic absorption of strontium from topical oral formulations is minimal.

Function

ORAL CARE

Skin benefits

  • Hydroxyapatite particles can fill and smooth microscopic surface irregularities on tooth enamel
  • Supports remineralization of early carious lesions in oral care applications

Known concerns

  • Strontium may cause temporary tooth discoloration in rare cases with some formulations
  • Not recommended for use in children under 12 years in some regulatory jurisdictions

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.