Best For Skin Types
All, Dry, Mature, Sensitive
Addresses
Usage Frequency
Daily
What Is Phytosteryl Isostearyl Dimer Dilinoleate?
Phytosteryl isostearyl dimer dilinoleate is a plant-derived ester synthesised from phytosterols and fatty acids. Unlike traditional lanolin (derived from sheep's wool), this ingredient is entirely plant-based, making it a sustainable alternative for formulators seeking natural conditioning agents.
In skincare and haircare formulations, it functions as an emollient and skin conditioner, helping to soften and smooth the skin surface. It also acts as a binder and viscosity controller, contributing to product texture and stability.
How It Works
As an occlusive emollient, this ingredient sits on the skin's surface, forming a protective barrier that slows water evaporation. This helps maintain hydration levels, particularly useful in products designed to support dry or dehydrated skin.
Its chemical structure allows it to bind well with other ingredients in a formula, improving product consistency and performance. The high refractive index contributes to a pleasant feel and appearance on application.
Clinical Evidence & References
Research suggests this ingredient performs comparably to lanolin and refined lanolin alternatives in terms of water-holding capability and moisturising efficacy in human use testing. It has been shown to deliver a moisturising effect in both skincare products and cleansing formulations.
However, evidence specific to this ingredient in isolation remains limited in the published literature. Most data comes from manufacturer-supported research rather than independent clinical trials, so further investigation would strengthen confidence in its long-term benefits.
How to Use
This ingredient is typically used in moisturisers, conditioners, and occlusive formulations at low concentrations. Look for it in product ingredient lists if you're seeking plant-based emollients with lanolin-like properties. Because it's present in relatively few products, availability may be limited compared to more common conditioning agents.
Safety & Precautions
Frequently Asked Questions
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