Silica

Evidence by route

About this ingredient

Silica (Silicon Dioxide) is mineral silicon dioxide. In cosmetics – amorphous spherical particles of micron and nano size. Acts as an absorbent (soaks up sebum), mattifying agent (scatters light on skin, masks pores and shine), and as a functional anti-caking ingredient in powder products. Where applied. Mattifying primers, foundations, loose powders, brow and lash tints, oily-skin products, deodorants, scrubs (as a mild abrasive), toothpastes. In Spanish brands – in Sesderma matifying, Babé Pediatric, Bioderma Sebium for oily skin. Concentration 0.5-30% depending on product type. Nano-size controversy. Some silica in mattifying formulas is nano-fraction (<100 nm). EU Regulation EC 1223/2009 requires '[nano]' labeling for nano-sized silica. SCCS Opinion 2015 confirmed synthetic nano-silica safety in decorative cosmetics and skincare applied to intact skin. Aerosol forms and spray products with nano-silica are not recommended due to theoretical inhalation risk. Crystalline form controversy. Crystalline silicon dioxide (quartz, cristobalite) is a known carcinogen on long-term inhalation (lung silicosis in industrial workers, miners). In cosmetics – ONLY amorphous silica without crystalline structure. No carcinogenic risk. EU CosIng permits use. Safety. CIR confirmed amorphous silica safety in cosmetics (Final Report 2009, 2017 amendments). Hypoallergenic, non-irritating, non-comedogenic. Suitable for sensitive, acne-prone, atopic skin. Pregnancy and lactation – safe. A mineral ingredient, no biological skin activity, no systemic absorption. No restrictions in any product.

Tolerability and safety

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