Silica is a mineral-derived ingredient (silicon dioxide) used in cosmetics to absorb oil and sebum, improve texture, and act as a bulking, anti-caking, or matting agent. It is generally inert and well tolerated on skin.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin dryness | Uncommon | Due to oil-absorbing properties, particularly in high concentrations or on already dry skin. |
Skin irritation or sensitivity | Rare | Occasional mild irritation reported, more likely with compromised skin barrier. |
Respiratory irritation from inhalation of loose powder | Rare | Relevant mainly to powdered formulations; crystalline silica inhalation is a concern, but cosmetic-grade amorphous silica poses minimal risk. |
Allergic contact dermatitis | Very rare | Silica is considered largely non-sensitizing; reactions are exceptional. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.