Squalane in skincare: where it comes from

Two things make squalane unusual among skincare ingredients. The first is that its name is one letter away from a different molecule, squalene, and the two are constantly confused. The second is that the same molecule reaches the bottle from radically different origins: an olive grove, a fermentation tank of engineered yeast, or, until the 2000s, a shark. The finished ingredient is chemically the same either way, which is precisely why sourcing is the interesting axis on this ingredient rather than a footnote. This page is organized by origin.

Squalene and squalane

Squalene, with an "e", is a naturally occurring polyunsaturated hydrocarbon. Chemical formula C₃₀H₅₀. The "ene" suffix marks the double bonds, and those double bonds are the problem: squalene oxidizes quickly on exposure to oxygen and light. It is found in human sebum, in shark liver oil, and in some vegetable oils.

Squalane, with an "a", is the fully hydrogenated, saturated form of that molecule. C₃₀H₆₂. Hydrogenation removes the double bonds, producing a lipid that is shelf-stable, resists oxidation, and behaves predictably on skin. That single processing step is the reason squalane, not squalene, is what cosmetic formulators use. Squalene is the molecule in your skin; squalane is the molecule that survives in the bottle.

Every source below is really a source of squalene. The hydrogenation step that turns it into squalane is common to all of them, which is why the finished ingredient from an olive and the finished ingredient from sugarcane are the same compound.

Human sebum

Sebum is the reference point rather than a raw material. Squalene makes up roughly 12 percent of the oil the sebaceous glands produce, and that is the fact underneath most of what squalane does on skin. Topical squalane sits on the surface as a familiar lipid, which is why it absorbs without leaving a greasy film even on oily skin, and why its comedogenic rating sits in the lowest tier (about 0 to 1).

It also forms a light barrier that slows transepidermal water loss. Unlike heavy occlusives such as petrolatum and mineral oil, squalane limits evaporation without sealing the skin, so hydration improves without the trapped feeling. It is an emollient, not a humectant: it holds water in rather than bringing water to the skin, which is why it works best applied over a humectant-based moisturizer rather than instead of one. Jojoba oil is the closest comparison in sebum-mimicry terms, with a waxier feel; olive oil is heavier and slower to absorb.

Recent research adds a second dimension. The 2025 Wolosik papers below examine squalane in the context of UVA-generated reactive oxygen species and of collagen biosynthesis under UV stress in human dermal fibroblasts. This is research on the molecule, not a promise about outcomes, and it is emphatically not sun protection: squalane does not block UV from reaching skin, so it sits alongside SPF rather than replacing it. Nor does it substitute for retinoids or peptides, which act through cellular signaling; nor does it rebuild the barrier, which living epidermal cells build from the inside. Squalane is a foundational emollient with real but bounded properties, and its own stability is the main thing that sets it apart from other plant oils.

Shark liver

Historically this was the commercial source. Sharks store large amounts of squalene in their livers, and hydrogenating shark liver oil produced cosmetic-grade squalane efficiently. Environmental and ethical concerns about shark harvesting drove a major industry shift during the 2000s, and the plant and biotech routes below now supply the overwhelming majority of the market.

The legacy still shapes how the ingredient is labeled. Because the finished molecule is identical regardless of origin, an ingredient list that just says "squalane" does not tell you where it came from. That is why reputable brands specify "plant-derived" or "olive-derived" on the label, and why it is a fair thing to check.

Olive oil

Olive is the most common modern source. High-quality squalane is produced via fermentation and hydrogenation of olive oil constituents, which yields the same C₃₀H₆₂ molecule with a well-established supply chain behind it. It is the default assumption when a label says plant-derived without further detail, and it is what WhollyKaw uses.

Worth separating clearly: olive-derived squalane is not olive oil. Olive oil is an oleic-acid-rich triglyceride with a heavier feel and a full complement of minor plant constituents. Squalane is a single purified hydrocarbon isolated from that starting material. They share an origin and almost nothing else.

Sugarcane

The biotech route is the newer one. Amyris Inc. and similar companies engineer yeasts to produce squalene from sugarcane feedstock, which is then hydrogenated in the usual way. The output is vegan, the feedstock is renewable, and the molecule is identical to the olive-derived version. For anyone choosing on sustainability grounds rather than performance grounds, this is the source that differentiates, because the finished ingredient cannot.

Rice bran, wheat germ, and amaranth

Several other plants contain squalene in smaller proportions and are used at smaller scale. They rarely appear as a labeled distinction on finished products, but they exist as part of the plant-derived supply and are worth knowing when a brand names a specific botanical origin. The full picture:

One practical consequence of the whole table: sourcing is an ethical and environmental question, not a performance one. There is no version of squalane that performs better because of where its squalene started out, and any brand implying otherwise is selling the origin story rather than the chemistry.

A second consequence is about tolerance. Because squalane is isolated and hydrogenated rather than pressed, it does not carry over the sensitizing minor components (terpenes, oleocanthal and the like) that can travel with whole plant oils. Allergic reactions to squalane are extremely rare, it is considered safe in pregnancy and breastfeeding at cosmetic concentrations, and it has no documented interactions with retinoids, vitamin C, niacinamide, or hyaluronic acid. That inertness is also why formulators use it as the carrier for lipid-soluble actives such as vitamin E and peptides: it holds them without oxidizing around them. None of that is a claim about what it will do for your skin, and anything you are treating rather than moisturizing belongs with a dermatologist.

Bare Naked Pre-Shave Oil and Eye Centella Cream

• Bare Naked Pre-Shave Oil: olive-derived squalane is the primary emollient, chosen for the sebum-mimetic structure that lubricates the razor pass without leaving a heavy film for the lather to fight.
• Eye Centella Cream: squalane as the carrier emollient under the centella and ectoin active stack, a role it earns through its stability rather than its own activity.

Related ingredient reading: Beef tallow in skincare (a complementary sebum-mimetic emollient) · Niacinamide · Argan oil.