Squalane

A hydrogenated and stabilised form of squalene — a lipid naturally produced by human sebaceous glands that declines measurably with age. Squalane (not squalene) is stable for use in cosmetics and functions as a lightweight, non-greasy emollient that replenishes skin lipids and reduces transepidermal water loss without occluding pores. Human skin recognises it as a native lipid, making it exceptionally well-tolerated and non-comedogenic across most skin types. Sourced from olives, sugarcane, or sharks (the latter now largely discontinued). Human clinical evidence for barrier repair and skin softening is solid; typically used at 1–100% depending on the formulation. One of the most broadly compatible oils in skincare.