Emollient / Lipid

Squalane

Squalane is the hydrogenated (stable) form of squalene, a lipid naturally produced by skin. It is an excellent lightweight emollient that reinforces the skin barrier, reduces transepidermal water loss, and is non-comedogenic despite being an oil. Well tolerated by virtually all skin types.

topicalbarrier supporthydrationbeginner-friendly

Moderate Evidence

Last reviewed: March 2026 · Our methodology

What It Does

Squalane works as an emollient — it fills the spaces between skin cells, smoothing the surface and reducing transepidermal water loss (TEWL). Because squalane is bioidentical to squalene (which constitutes 10–12% of skin surface lipids), it integrates seamlessly into the skin’s existing lipid structure without disrupting barrier function.

Key distinction: squalene (with an ’e’) is the naturally occurring, unsaturated form that oxidises quickly. Squalane (with an ‘a’) is the hydrogenated, fully saturated version used in skincare — it is shelf-stable and does not oxidise on skin. Modern squalane is typically derived from sugarcane or olives rather than shark liver oil.

Best Use Cases

Lightweight barrier repair (especially for oily or combination skin that cannot tolerate heavy creams)
Sealing in hydrating layers (use as the last step before sunscreen)
Reducing TEWL and improving barrier function
Mixing with other products to improve spreadability
Night-time occlusive layer for dry skin (as an alternative to petrolatum)

Who May Benefit Most

All skin types, including oily and acne-prone. Squalane is non-comedogenic and lightweight enough for oily skin while providing meaningful barrier support for dry skin. It is particularly useful for people who find traditional moisturisers too heavy or who react to common moisturiser ingredients.

Cautions

Extremely well tolerated. Non-comedogenic, non-irritating, fragrance-free in pure form. Allergic reactions are exceptionally rare. The only consideration: squalane alone is not a complete moisturiser — it provides emolliency but not humectant (water-attracting) properties. Layer over a hydrating serum or use alongside a ceramide product for comprehensive moisture support.

Common Mistakes

Using squalane as a complete replacement for moisturiser (it provides emolliency but not humectancy)
Applying too much — a few drops are sufficient for the entire face
Not layering correctly — squalane should go over water-based products, not under them
Choosing squalane derived from shark liver oil without checking sourcing (plant-derived is standard now)

Combines Well With

Hyaluronic acid (apply HA first for humectancy, seal with squalane for emolliency)
Ceramides (complementary barrier lipids)
Niacinamide (mix or layer)
Retinoids (squalane can reduce retinoid-related dryness when applied after)
Any active serum (apply squalane after actives to seal them in)

May Combine Poorly With

Rarely conflicts with anything — this is one of its main advantages
Silicone-heavy products (may pill when layered)

Realistic Timeline

Barrier support and moisture retention improvements are often noticeable within days. Squalane is not an active — it does not ’treat’ anything. Its value is in maintaining the conditions that allow active ingredients to work and keeping the barrier healthy.

Disclaimer

Squalane is a cosmetic emollient, not an active treatment. It supports skin barrier function but does not treat specific skin conditions. It is a vehicle and protector, not a cure.