Hydrogenated Mineral Oil

Hydrogenated mineral oil is a refined petroleum derivative that has undergone hydrogenation—a process that saturates its molecular structure to increase stability. It functions as an occlusive ingredient, meaning it forms a protective layer on the skin's surface to reduce transepidermal water loss.In cosmetic formulations, it serves a skin-protecting role and is commonly used in moisturisers, balms, and barrier-repair products. The hydrogenation process distinguishes it from standard mineral oil by making it less prone to oxidation.

Hydrogenated mineral oil works by sitting on the skin's surface and forming a semi-occlusive film. This layer reduces the rate at which water evaporates from the outer layers of skin, helping to maintain hydration levels—particularly useful when the barrier is compromised or skin is very dry.Because it doesn't penetrate deeply into the skin, it's considered a surface-level conditioning agent rather than a humectant. This makes it especially effective in products designed for immediate barrier support.

Apply hydrogenated mineral oil–containing products to clean, slightly damp skin to help seal in hydration. It works well as part of a layering routine, typically applied after lighter serums or essences but before or instead of heavier creams. If using in balm form, a little goes a long way; start conservatively to avoid heaviness. It can be used daily, though those prone to congestion may prefer occasional use or application only to very dry areas.

Hydrogenated mineral oil is generally well-tolerated and non-irritating for most people. Those with acne-prone or congestion-prone skin should patch-test first, as heavy occlusives can occasionally trigger breakouts in sensitive individuals.