Squalene

Benefits
MoisturizingSofteningUV Protection
Concerns
Malassezia Feeding

What is Squalene?

Squalene is a branched-chain, unsaturated triterpene hydrocarbon (C30H50) produced naturally by all plants and animals, constituting up to 13% of human sebum for barrier protection. Historically extracted from shark liver, modern cosmetic-grade squalene derives primarily from olive oil, sugarcane, or yeast fermentation for sustainability. In skincare and haircare formulations like creams, serums, oils, and conditioners, it functions as a versatile emollient by penetrating the upper skin layers to replenish lipids, enhance barrier integrity, and minimize water evaporation without greasiness. Its similarity to skin's own oils promotes even distribution and product stability. Additionally, squalene demonstrates antioxidant capacity against oxidative stress and absorbs certain UV wavelengths, aiding light protection in leave-on products.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Antistatic agent
Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.
Refatting
Replenishes lipids removed during cleansing to improve mildness and reduce tightness, leaving skin or hair feeling less stripped after rinse-off use.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Delivers moisture by integrating with skin lipids to support hydration.

Smooths and conditions skin and hair surfaces for improved texture.

Helps shield against UV-induced damage through natural absorption.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with dry or dehydrated skin seeking lightweight hydration.
Users prone to Malassezia-related conditions like fungal acne.
People aiming to condition hair for better manageability and shine.
Individuals with sensitivities to unsaturated oils that may oxidize.
Those preferring plant-based emollients in daily routines.
People preferring fully saturated alternatives to minimize potential reactivity.

Safety Notes

  • Rated low hazard by environmental health assessments.
  • Deemed safe for cosmetic use by expert safety reviews.

Frequently Asked Questions about Squalene

What makes squalene unique in cosmetics?

Its structure matches human sebum, allowing deep integration for effective emollience without heaviness.

Is squalene comedogenic?

No, it has a rating of zero, making it unlikely to block pores.

How does squalene support UV protection?

It naturally absorbs some UV rays, contributing to mild photoprotection in formulations.