Oregon Esthetician State Board

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Which ingredient is derived from petroleum and used as a moisturizer?

Glycerin
Mineral oil
Allantoin
Lanolin

The correct answer is: Mineral oil

Mineral oil is a byproduct of petroleum and is widely used in skincare products for its moisturizing properties. As a lightweight oil, it forms a barrier on the skin, helping to lock in moisture and prevent water loss. This occlusive nature makes mineral oil particularly effective for retaining hydration in the skin. Other options like glycerin, allantoin, and lanolin serve different roles in skincare; for example, glycerin is a humectant that draws moisture from the air into the skin but is not derived from petroleum, and allantoin is known for its soothing properties but does not act as a traditional moisturizer. Lanolin, while effective as an emollient and derived from sheep's wool, is also not petroleum-based.