Liquidum Paraffinum (liquid paraffin/mineral oil) is a highly refined, colorless petroleum-derived oil used in skincare as an occlusive emollient that reduces transepidermal water loss and softens the skin. It is widely used in moisturizers, cleansers, and ointments as a base ingredient due to its stability and low reactivity.
| Reported effect | How often | Notes |
|---|---|---|
| Comedogenicity (pore clogging) | Uncommon | Highly refined cosmetic-grade mineral oil is generally low-comedogenic, but occlusive effects may aggravate acne in some prone individuals. |
| Folliculitis | Uncommon | Occasionally reported with occlusive use, particularly under heavy or prolonged application. |
| Contact irritation or follicular eruption | Rare | Mild irritation possible, especially in sensitive or compromised skin. |
| Allergic contact dermatitis | Very rare | Mineral oil is considered minimally allergenic; true allergy is exceptionally uncommon. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.