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Synthetic Fluorphlogopite

Commonly feared, low concern·Strong evidence

Synthetic fluorphlogopite is a lab-grown mica look-alike made of layered magnesium aluminum silicate sheets with some fluorine substitution, used as a shimmer and pearlescent base in powders, eyeshadow, and skincare. CIR's expert panel reviewed irritation, sensitization, and genotoxicity data and concluded it's safe as used at reported concentrations up to 67%.

The myth vs the evidence

The word 'synthetic' next to a mineral name can read as more processed or riskier than 'natural mica.' The evidence points the other way on this one: natural mica mining has documented labor and contamination problems, and natural mica flakes can carry trace heavy metals. Lab-grown fluorphlogopite is made from purified starting materials under controlled conditions, giving more uniform particles and lower heavy-metal impurities than the natural mineral. CIR's panel found it non-irritating, non-sensitizing, and not genotoxic at concentrations up to 67% in both leave-on and rinse-off products.

Products with Synthetic Fluorphlogopite

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.