Squalene in Skincare: Benefits, Challenges & Market Trends

Squalene is a natural unsaturated triterpene cosmetic oil raw material, included in China's Catalogue of Used Cosmetic Raw Materials (2021 Edition) with CAS number 111-02-4. It is a core lipid raw material highly consistent with human sebum components, widely applied in Sensitive Skincare, barrier repair products, sun care, hair care and medical beauty repair formulations. Natural squalene is mostly extracted from deep-sea shark liver oil, while plant-derived cosmetic-grade squalene is fermented and refined from olive oil, amaranth oil and sugarcane, with purity ≥99.5%. It appears as clear, pale yellow transparent oily liquid with mild natural lipid odor, featuring ultra-light molecular weight, excellent skin penetration, strong oil miScibility and emulsion compatibility, with long-term globally verified mild safety.

Its core mechanism relies on its molecular structure identical to human epidermal sebum lipids: it quickly fuses with intercellular lipids of the stratum corneum to replenish missing sebum components, reconstruct complete lipid barrier; its unsaturated double bonds capture free radicals to relieve oxidative damage; small molecular weight allows it to penetrate deep into the stratum corneum to deliver nutrients without forming heavy occlusive film, balancing moisturization and skin breathability.

Core Physicochemical Parameters

• Molecular formula: C₃₀H₅₀
• Molecular weight: 410.72 Da
• Density (25℃): 0.858–0.863 g/cm³
• Refractive index: 1.494–1.497
• Insoluble in water, fully miscible with vegetable oils, synthetic esters, silicones, alcohol solvents
• Susceptible to oxidation under high temperature and strong light, needs antioxidant compounding for long-term stability

Benefits for the Skin

Squalene realizes multi-dimensional skin care effects centered on barrier reconstruction, anti-oxidation anti-aging, mild moisturization and formula synergism, low irritation and suitable for all skin types including sensitive and damaged skin.

Homologous Sebum Replenishment & Barrier Repair Matching the lipid composition of human sebum, squalene is easily absorbed by the epidermis without rejection. It fills lipid gaps between keratinocytes to repair damaged barrier caused by dryness, acid peeling, excessive cleansing and medical beauty operations, rapidly relieve tightness, flaking, redness and dry itch. Continuous use for 28 days can significantly reduce transepidermal water loss by over 30%, recover skin self-locking water capacity, ideal for fragile sensitive skin, redness-prone skin and post-procedure skin. Natural Antioxidant, Anti-Aging & Anti-Free Radical The multiple unsaturated double bonds in squalene can neutralize reactive oxygen free radicals induced by ultraviolet radiation, environmental pollution and stress, reduce oxidative damage to collagen and elastin, slow down skin dullness, yellowing and fine lines caused by photoaging. It inhibits lipid peroxidation of epidermal oils, delays skin aging, brightens uneven complexion, and effectively improves early aging signs such as dry fine lines and rough texture.

Lightweight Deep Moisturizing Without Greasiness Compared with heavy mineral oil and thick vegetable oil, squalene has ultra-small molecular volume, penetrates rapidly into the stratum corneum instead of staying only on skin surface. It delivers deep moisturization without forming airtight oil film, avoids sticky, greasy and stuffy feeling. For oily and acne-prone skin, it regulates sebum balance, improves abnormal excessive oil secretion caused by barrier damage, alleviates oily luster while replenishing lipids. Ultra-Mild, Low Comedogenic & Wide Skin Adaptability Certified safe by CIR, EU SCCS and China NMPA, the recommended addition range for leave-on products is 0.5%–10%: Extremely low sensitization, zero irritation verified by repeated human patch tests; Comedogenic rating close to 0, rarely clog pores under standard dosage; No contraindications for pregnant women, infants and sensitive damaged skin; rare local redness is derived from other irritating ingredients in formulas rather than squalene itself. Strong Formulation Synergistic Effect It can be freely compounded with peptides, hyaluronic acid, plant extracts, sunscreen agents, antioxidants and most emulsifiers: Compound with hyaluronic acid, panthenol to combine deep lipid moisturization and water-based hydration, eliminate dry skin tightness; Match anti-aging peptides (SNAP-8, Matrixyl) to promote peptide transdermal penetration, strengthen anti-wrinkle and anti-aging effects; Mixed with vitamin C, vitamin E to form compound antioxidant system, double free radical removal capacity; Dissolve oil-soluble sunscreen actives, reduce sunscreen white cast and dryness, improve sunscreen skin feel.

Common Issues in Cosmetic Applications

As a high-value natural lipid raw material, squalene has typical pain points in formula stability, transdermal matching, ingredient compatibility and raw material storage, sorted out in Q&A form as follows:

Q: What stability deterioration risks will squalene face in cosmetic formulas?

A: Squalene contains unsaturated double bonds, vulnerable to oxidation deterioration under three conditions:

• Strong light and long-term high temperature: UV and heat trigger oxidation, resulting in oil yellowing, peculiar rancid odor and decreased antioxidant activity; finished products need opaque light-proof packaging, and avoid high-temperature emulsification above 75℃ during production;
• Strong acid environment (pH＜4): Accelerates molecular structure breakdown, weakens barrier repair capacity; acid skincare formulas need to control pH at 5–7 and add antioxidants like tocopherol;
• Contact with air for a long time: Continuous oxygen contact triggers lipid peroxidation, raw material barrels must be filled with nitrogen for sealed storage.

Q: Does squalene have transdermal absorption limitations? How to optimize its penetration efficiency?

A: Its 410Da molecular weight is moderate, can penetrate the stratum corneum smoothly, but cannot reach the deep dermis alone; when carrying macromolecular lipophilic actives, the delivery efficiency will decline. Optimization solutions: Compound with small-molecule penetration boosters (pentanediol, caprylyl glycol) or adopt liposome encapsulation technology, which can increase the transdermal efficiency of compounded active ingredients by up to 260%.

Q: Will compatibility conflicts occur when squalene is compounded with other cosmetic raw materials? What are specific manifestations?

A: It has wide compatibility, but conflicts will appear when matched with partial high-concentration functional raw materials:

• High-concentration anionic surfactants (>10%): Destroy oil-water balance, lead to lotion thinning, emulsion demulsification; add nonionic emulsifiers to buffer;
• High-concentration metal ion preservatives: Catalyze oxidation of squalene, accelerate oil yellowing; select non-metal preservative systems for matching;
• Super high-melting hard waxes: Easy to crystallize and bloom on product surface under low temperature; adjust the proportion of squalene and waxes, add low-viscosity synthetic ester for auxiliary blending.

Q: What are the storage standards of squalene raw material and shelf-life related problems?

A: Bulk raw material storage requirements: Seal and store in cool, dry, dark warehouse, storage temperature ≤25℃, isolate air, avoid sunlight and damp environment. Improper storage hazards: Light and high temperature cause oxidation yellowing; air intake leads to rancid odor, acid value rise, loss of antioxidant efficacy. Shelf-life rules: Original sealed nitrogen-filled barrel raw material shelf life 24 months at room temperature; once opened, must fill nitrogen again and use within 3 months. After being formulated into finished products, the shelf life depends on the antioxidant system, generally 12–24 months.

Market Trends and Development

Driven by consumers' demand for homologous, mild, repair-oriented natural skincare raw materials, squalene maintains steady growth in global market demand. The cosmetics and personal care industry accounts for 61.7% of its total consumption volume (2025 data), with an expected compound annual growth rate of 6.2% from 2026 to 2034; the Asia-Pacific region becomes the core growth market, boosted by the rapid expansion of domestic sensitive skin care and medical beauty industries.

Expanding Application Scenarios

Traditional application fields including sensitive skin moisturizing oil, facial cream, body lotion remain dominant, and emerging niche categories grow rapidly:

• Medical beauty post-repair series: The first-choice lipid raw material for minimally invasive surgery recovery products to relieve redness and repair damaged barrier;
• Baby & maternal care products: Ultra-mild non-irritating formula, suitable for infant fragile skin and pregnant women skincare;
• Men’s skincare: Light oil-control moisturizer, aftershave oil, balancing sebum without heavy greasy texture;
• Clean beauty & organic skincare: Plant-derived squalene replaces shark-source squalene, complying with animal protection and sustainable cosmetic regulations;
• Hair care products: Repair dry split ends, relieve scalp dryness and itching, balance scalp oil secretion. The mainstream formulation trend is compound lipid system, matched with synthetic esters, plant triglycerides to balance raw material cost and skin feel performance.

Core Industrial Technological Innovation Directions

• Bio-fermentation process upgrade: Optimize sugarcane/olive fermentation purification technology, improve plant-source squalene purity, reduce peculiar odor, gradually replace shark liver oil extracted squalene to meet animal protection requirements;
• Stabilization modification technology: Develop hydrogenated squalene, microcapsule encapsulated squalene to enhance oxidation resistance, solve the easy-yellowing defect of natural squalene;
• Low-carbon green extraction: Zero-solvent physical refining technology reduces production energy consumption, meets global sustainable cosmetic raw material standards.

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Industry Competition & Regulatory Pattern

Global suppliers are divided into two camps: overseas brands focusing on shark-derived high-purity squalene, and domestic manufacturers taking plant fermented squalene as the core competitive advantage. Domestic brands rely on cost, delivery and green raw material advantages to accelerate domestic substitution, intensify market competition, and push differentiated product iteration (medical cosmetic special grade, baby care low-odor grade).

Global cosmetic regulations continuously standardize natural lipid raw material supervision: China, EU, Japan issue restrictions on shark-derived squalene trade, prioritize plant-source sustainable raw materials; strictly limit heavy metal, residual solvent, peroxide value indicators of squalene, eliminate low-purity crude oil from cosmetic supply chain, and promote standardized production of the whole industry.

Overall, squalene is an irreplaceable homologous natural lipid raw material for barrier repair skincare, with unique dual effects of barrier replenishment and anti-oxidation. The popularization of bio-fermentation technology and the expansion of sensitive skin & medical beauty market demand will become the core driving forces for its long-term sustainable development of the industry.

Name: Chloe Liang

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