Squalane
In plain terms
A lightweight moisturizing oil nearly identical to a lipid your own skin makes. It is one of the most universally tolerated emollients: stable, non-greasy, and non-pore-clogging.
What the evidence shows
Squalane is a lightweight moisturizing oil that closely matches a lipid your own skin makes, which is why it tends to feel so at home on skin and rarely causes trouble. The 2023 CIR expert panel found it non-irritating and hypoallergenic across all skin types, allergic reactions to pure plant-derived squalane are rare, and it carries the lowest pore-clogging rating, so dermatologists reach for it even on oily and acne-prone skin. It does not raise sun sensitivity and is considered fine to use in pregnancy. The one point worth understanding is the spelling. Squalene, with an e, is the natural form in your sebum, and it oxidizes easily into pore-clogging, irritating byproducts; squalane, with an a, is the same molecule hydrogenated into a stable form that resists exactly that. The version in your bottle is the stable one, which is the whole reason it exists. A minor footnote: olive-derived squalane that was not fully hydrogenated can carry a trace of leftover squalene, so a pharmacopoeia grade or a certificate of analysis is a reasonable purity check. Beyond that, the main thing to know is about sourcing rather than safety: squalane was historically taken from shark liver oil, while modern squalane is overwhelmingly plant-based from olives or sugarcane, an ethical choice you can confirm on the label.
On the label
Listed as squalane (with an a). Most modern squalane is plant-derived from olives or sugarcane rather than the historic shark-liver source, which is a sustainability point worth checking on the label rather than a safety one. A pharmacopoeia grade or certificate of analysis signals a fully refined, high-purity batch.