What it is
Mineral oil is a purified blend of liquid saturated hydrocarbons derived from petroleum. In cosmetics it is valued as an inert, stable emollient that softens skin and helps reduce moisture loss by forming an occlusive layer. The cosmetic and pharmaceutical grades used in skin care are highly refined to remove impurities.
Safety & warnings
Highly refined cosmetic-grade mineral oil is well tolerated and considered non-sensitizing for most users. It is occlusive, and heavier grades may feel greasy or contribute to clogged pores on acne-prone skin, though refined mineral oil itself is generally regarded as low on the comedogenicity scale.
Origin & sourcing
Mineral oil is petroleum-derived; cosmetic grades are produced by extensive refining and purification of crude oil fractions.
History
Mineral oil has been used in personal care and pharmaceutical products for well over a century as a stable, low-cost emollient and skin protectant.
Questions everyone asks
Is cosmetic mineral oil the same as crude oil?
No. Cosmetic and pharmaceutical mineral oil is highly refined and purified, removing the impurities present in unrefined petroleum.
Why is mineral oil used in sunscreen?
It serves as an emollient and occlusive that softens skin and helps limit moisture loss, improving the feel of the formula.