Squalane is a saturated and exceptionally stable emollient that mimics the natural lipids found in human sebum. It effectively prevents transepidermal water loss (TEWL) and reinforces the skin barrier without a heavy or greasy residue.
- INCI Name:
- Squalane
- Chemical/Scientific Name:
- 2,6,10,15,19,23-Hexamethyltetracosane
- Common Aliases:
- Perhydrosqualene, Robane
| Category: | Moisturizers |
| Source Origin: | Plant-derived (primarily sugarcane or olives) or Synthetic |
| Comedogenic Rating: | 0-1 |
| Primary Industries: | Skincare, Haircare, Cosmetics |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects
| Hydration/Moisture | |
| Barrier Repair | |
| Texture Enhancement | |
| Irritation Risk |
Primary Benefits:
- Prevents moisture loss by forming a protective lipid film on the stratum corneum.
- Provides a high degree of biocompatibility as it mimics human squalene.
- Offers excellent oxidative stability, ensuring a long shelf life in formulations.
- Softens skin texture and improves elasticity without clogging pores.
Potential Risks:
- Extremely low risk of irritation or allergic reaction.
- Potential for sourcing confusion (historically derived from shark liver, though modern cosmetic use is almost exclusively plant-based).
Biological Action & Cosmetic Profile
Human sebum naturally contains approximately 10-13% squalene, a polyunsaturated hydrocarbon that protects the skin from oxidative damage. However, squalene is highly unstable and prone to lipid peroxidation, which can trigger inflammation and acne. Squalane is the hydrogenated, completely saturated version of this molecule. This structural saturation makes the ingredient highly resistant to oxidation, ensuring it does not turn rancid or generate free radicals when exposed to light or air.
The molecular structure allows it to penetrate the spaces between skin cells efficiently. By filling these gaps, the lipid improves the integrity of the skin barrier. Clinical studies published in journals such as Biological & Pharmaceutical Bulletin highlight that squalane acts as a “physical” moisturizer rather than a humectant. It seals in existing water molecules, making it a critical component for treating xerosis (dry skin) and dermatitis.
In addition to its emollient properties, this lipid enhances the delivery of other oil-soluble actives. Because it integrates so seamlessly into the skin’s lipid bilayer, it can act as a carrier for molecules like Retinol or Tocopherol. Its lightweight, non-polar nature gives it a “dry oil” feel, providing the luxury of a facial oil with the rapid absorption of a serum.
Broader Applications & Origins
Modern manufacturing has shifted away from animal sources toward sustainable biotechnology. Most high-purity squalane is now produced through the fermentation of sugarcane or the processing of olive oil. Sugarcane-derived versions are often cited for their consistency and purity, as they lack the odor and potential impurities sometimes found in olive-derived stocks. Beyond skincare, this ingredient is used in haircare to reduce breakage and in lipsticks to provide smooth application.
Routine Integration
Synergies:
- Ceramide Np: Works alongside other skin-identical lipids to rebuild a damaged barrier.
- Ascorbic Acid: Helps stabilize and deliver oil-soluble forms of Vitamin C.
- Glycerin: Combines a humectant with an occlusive for comprehensive hydration.
- Butyrospermum Parkii Butter: Lightens the heavy feel of shea butter in rich creams.
Conflicts:
- No known biochemical conflicts; safe for use with all active ingredients including acids and retinoids.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has repeatedly evaluated squalane and its precursor, squalene, concluding they are safe for use in cosmetics at concentrations up to 100%. Dermatological testing consistently shows the ingredient is non-sensitizing and non-irritating, even for individuals with sensitive skin conditions like eczema or rosacea. Because it is chemically inert and mimics human lipids, it is one of the most well-tolerated ingredients in the modern cosmetic pharmacopeia.
Is squalane safe for acne-prone skin?
Yes. Unlike many other oils and emollients, squalane is non-comedogenic and highly resistant to oxidation. It provides necessary moisture without clogging pores or fueling the bacteria associated with acne.
What is the difference between squalane and squalene?
Squalene is the unsaturated, unstable version produced by the body. Squalane is the hydrogenated, stable version used in skincare products to ensure a long shelf life and prevent skin irritation from oxidation.
Can I use this ingredient every day?
Absolutely. It is a skin-identical ingredient that can be used morning and night. It is particularly effective when applied over water-based serums to lock in hydration.