Milk contains lactic acid, proteins, fats, and vitamins, and is used in skincare as a mild exfoliant and emollient. It can provide gentle moisturizing and surface smoothing through its naturally occurring alpha-hydroxy acid content.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation or stinging | Uncommon | Primarily from the lactic acid content, especially on sensitive or compromised skin. |
| Allergic contact dermatitis | Rare | Possible in individuals with milk protein allergy or sensitivity. |
| Acne flare or comedogenic reaction | Rare | Fat and protein components may contribute to clogged pores in some users. |
| Photosensitivity | Rare | Lactic acid (an AHA) may increase sun sensitivity; sunscreen advised. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.