Gold, typically used as colloidal gold or gold nanoparticles in skincare, is marketed for antioxidant and soothing benefits, though robust clinical evidence for anti-aging effects is limited. It is generally considered chemically inert in elemental form but can act as a contact sensitizer.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Uncommon | Gold (gold sodium thiosulfate) is a recognized contact allergen; reactions present as localized redness, itching, or eczema. |
| Skin irritation or redness | Rare | Mild transient irritation can occur, often related to other formulation ingredients. |
| Localized facial/eyelid dermatitis | Rare | Persistent eyelid or facial eczema has been linked to gold sensitivity in patch-test studies. |
| Chrysiasis (skin discoloration) | Very rare | Bluish-gray pigmentation reported mainly with systemic or injected gold, not typical topical cosmetic use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.