Ingredient dictionary

Mineral Oil

Also listed as: Paraffinum Liquidum, Liquid Paraffin

Mineral oil is a clear, odorless oil refined from petroleum. It is used mainly to lock moisture into the skin. It is on the label of 51 products in our library. Checked against our library November 6, 2026.

The catch: mineral oil belongs to the mineral oil and petrolatum family of refined petroleum emollients, which some people avoid by preference, especially on acne-prone skin.

Mineral oil & petrolatum. They are excellent at sealing in moisture. Some people avoid them by preference, especially on acne-prone skin.

What Mineral Oil does

Seals moisture into the skin
Slows water loss from the surface
Gives slip and a smooth feel
Helps soften dry, rough patches

Mineral oil is made from petroleum, the crude oil also refined into fuels. Refiners remove reactive and colored parts, leaving a clear, odorless mix of hydrocarbons. Because these molecules are stable, the oil is less likely to turn rancid than many plant oils.

Formulators use it because it is a very effective occlusive. It forms a thin film that slows water loss, so it appears in moisturizers, body lotions and lip care. It feels smooth and slippery rather than sticky, and helps spread other ingredients evenly. Some people find it heavier than lighter oils.

Good for

Dry, flaky or rough skin, and anyone who wants a protective layer that keeps moisture from escaping.

Be careful if

Mineral oil belongs to the mineral oil and petrolatum family of refined petroleum emollients, which some people avoid by preference, especially on acne-prone skin.

Frequently asked questions

Is mineral oil safe for skin?

Highly refined mineral oil is widely used in cosmetics and is generally considered well tolerated by most people. Its main effect is holding moisture in. Reactions are uncommon, but skin varies, so patch testing a new product is sensible.

Why do some people avoid mineral oil?

Mostly by preference. Some people like to avoid heavy, occlusive ingredients, especially on acne-prone skin. It does seal well, so the choice comes down to how your skin reacts and what you like.