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thickener

Silica

Generally safe·Strong evidence

A mineral thickener and anti-caking agent widely used in sunscreens and cosmetics to control texture and prevent ingredient separation. CIR has reviewed silica in cosmetic use and found no basis for concern at the levels used topically.

Questions

Is silica the same as talc?
No. Silica (silicon dioxide) and talc are different minerals with distinct chemical structures. Silica is widely used in sunscreens and cosmetics as a thickener and anti-caking agent. CIR has reviewed silica in topical cosmetic formulations and found no basis for concern at the levels used.
Can inhaling silica from powders or sunscreens harm me?
Silica in leave-on cosmetics and sunscreen lotions presents a different exposure profile than inhaled dust. Published safety assessments have evaluated silica specifically in cosmetic applications and found it acceptable for topical use as formulated in products.

Products with Silica

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.