Sodium iodide is an inorganic iodine salt occasionally used in topical formulations as a source of iodine for its antiseptic properties and as a stabilizer or adjunct in certain preparations. It is more commonly encountered in pharmaceutical and antiseptic contexts than in mainstream cosmetic skincare.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation or stinging | Uncommon | May cause localized irritation, particularly on sensitive or broken skin. |
| Contact dermatitis | Uncommon | Allergic or irritant contact reactions reported with iodine-containing topicals. |
| Iododerma (acneiform or papulopustular eruption) | Rare | Associated with iodine sensitivity or excessive systemic/topical exposure. |
| Skin staining or discoloration | Uncommon | Temporary yellow-brown discoloration possible with iodine-based products. |
| Systemic iodine effects (thyroid disturbance) | Very rare | Possible with extensive application over large or broken skin areas, especially in susceptible individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.