Hectorite is a naturally occurring clay mineral (a magnesium-lithium silicate of the smectite group) used in cosmetics as a viscosity-building, suspending, and stabilizing agent. It helps thicken formulations and keep pigments or other particles evenly dispersed.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Rare | Mild irritation possible, generally only with high concentrations or compromised skin barrier. |
Allergic contact dermatitis | Very rare | Clay minerals are largely inert; sensitization is uncommon and may relate to impurities. |
Mechanical dryness | Uncommon | Absorbent clay can contribute to a drying or tight feel in leave-on products. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.