Squalene: What Your Skin Already Makes
Squalene, with an “e,” is a naturally occurring oily compound found in humans, animals, and plants. It is a component of sebum, the oil your skin produces to help keep itself moisturized.
Natural squalene production declines with age, which is one reason skin often becomes drier over time.
The main drawback is that squalene is chemically unstable and oxidizes quickly. This means it can degrade and become rancid relatively fast when isolated for use in skincare products.
Squalane: The Stable, Skincare-Friendly Version
Squalane, with an “a,” is squalene that has been hydrogenated. This chemical process makes it much more stable for use in skincare products, gives it a longer shelf life, and reduces the risk of rancidity.
Because squalane is very similar to a substance naturally found in the skin, it is generally well tolerated across a wide range of skin types, including sensitive and acne-prone skin.
Squalane is also generally considered noncomedogenic, meaning it is unlikely to clog pores.
Potential Skin Benefits of Squalane
Squalane may help with:
- Locking in moisture and reducing water loss
- Softening and smoothing skin texture
- Supporting the skin barrier
- Adding emollience without feeling excessively heavy
- Layering well with other skincare products
Where Squalane Comes From
Historically, squalane was often derived from shark liver oil, which raised sustainability and ethical concerns.
Most squalane used in skincare today is derived from plant-based sources, commonly:
- Olives
- Sugarcane
The source may vary by manufacturer, so people who prefer vegan skincare may want to confirm how a specific product’s squalane is produced.
Where Hemisqualane Fits In
Hemisqualane is related to squalane but is a distinct ingredient. It has approximately half the molecular weight of squalane, which gives it a lighter and faster-absorbing texture.
It is often produced through the fermentation of sugarcane byproducts and used as a plant-based alternative to silicones in cosmetic formulas.
Potential Benefits of Hemisqualane
Hemisqualane may help:
- Soften the skin
- Reduce moisture loss
- Improve product spreadability
- Create a lightweight, non-greasy finish
- Smooth the hair without a heavy coating
Because of its lighter texture, hemisqualane is commonly used in:
- Lightweight moisturizers
- Sunscreens
- Hair products
- Silicone-free formulas
- Products designed for oily or combination skin
Squalane vs. Squalene vs. Hemisqualane
Squalene
Squalene is the oily compound naturally produced by the skin, but it is unstable when isolated for use in cosmetic products.
Squalane
Squalane is the hydrogenated, more stable version used in most skincare products. It has a richer emollient texture and is suitable for many skin types.
Hemisqualane
Hemisqualane is a lighter related ingredient that absorbs more quickly and is often used in lightweight or silicone-free formulations.
Which One Is Best for Your Skin?
The best option depends largely on your skin type and texture preferences.
- Dry or sensitive skin: Squalane may provide a more cushioning, moisturizing feel.
- Oily or combination skin: Hemisqualane may feel lighter and less greasy.
- Acne-prone skin: Both squalane and hemisqualane are generally considered well tolerated, although individual reactions are still possible.
- Very lightweight formulas: Hemisqualane is often preferred.
- Richer moisturizers or facial oils: Squalane is more commonly used.
The Bottom Line
Squalene is a natural component of the skin’s oil, but it is too unstable for widespread use in skincare. Squalane is the stabilized version found in most cosmetic products, while hemisqualane is a lighter related ingredient often used in fast-absorbing and silicone-free formulas.
All three are generally considered safe and well tolerated. The best choice usually comes down to skin type, product texture, and personal preference rather than one ingredient being universally better than the others.
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