This biomimetic emollient replicates the structural organization of skin-identical lipids to reinforce the moisture barrier and restore elasticity. By forming stable lamellar liquid crystals, the complex integrates into the stratum corneum to prevent transepidermal water loss while providing a rich, non-greasy skin feel.
- INCI Name:
- Phytosteryl Behenate, Octyldodecyl Lauroyl Glutamate
- Chemical/Scientific Name:
- N-Lauroyl-L-glutamic acid di(phytosteryl/2-octyldodecyl) ester mixed with behenic acid esters
- Common Aliases:
- Pseudoceramide, Amino Acid-Derived Emollient, Eldew PS-203
| Category: | Softeners |
| Source Origin: | Plant-derived (Glutamic acid, Phytosterols from soy/rapeseed) and Synthetic |
| Comedogenic Rating: | 1 |
| Primary Industries: | Cosmetics, Dermatology, Personal Care |
| Solubility: | Oil-soluble (Lipophilic) |
At a Glance: Properties & Effects
| Barrier Repair | |
| Hydration/Moisture | |
| Texture Enhancement | |
| Irritation Risk |
- Primary Benefits: Deeply restores the lipid bilayer, provides long-lasting moisturization via lamellar structure formation, and improves skin smoothness.
- Potential Risks: Extremely low risk of irritation; generally considered non-sensitizing and non-comedogenic.
Biological Action & Cosmetic Profile
The molecular architecture of this complex is specifically engineered to mimic the intercellular lipids found in the human skin barrier. Utilizing a glutamic acid backbone, the substance aligns its hydrophobic phytosteryl and octyldodecyl groups into a lamellar (layered) phase. This arrangement creates a “pseudoceramide” effect, where the ingredient functions similarly to Ceramide Np by filling gaps in the lipid matrix of the stratum corneum. Unlike standard hydrocarbon oils, this ester blend exhibits high water-holding capacity, effectively trapping moisture within the skin’s structural layers rather than simply sitting on the surface.
Physiological compatibility remains a hallmark of this ingredient due to its plant-derived sterol components. Phytosterols are structurally analogous to Cholesterol, a vital component of the skin’s natural moisture barrier. When topically applied, the blend integrates into the skin’s own lipid bilayers, repairing damage caused by harsh surfactants or environmental stressors. The addition of Behenic Acid further stabilizes the formulation, ensuring a high melting point that translates to a rich, protective film without a heavy or sticky residue.
Dermatological performance is characterized by an immediate improvement in skin elasticity and tactile smoothness. Because it supports the “liquid crystal” state of the skin’s oils, it enhances the penetration of other active substances by maintaining the fluidity of the cell membranes. This makes it an ideal vehicle for delivering fat-soluble vitamins or antioxidants deep into the epidermal layers while simultaneously preventing transepidermal water loss (TEWL).
Broader Applications & Origins
Originally developed through advanced amino acid chemistry, this ingredient represents a bridge between green chemistry and high-performance dermatology. The glutamic acid used in its synthesis is typically derived from the fermentation of plant-based sugars, while the phytosterols are sourced from non-GMO vegetable oils. While its primary use is in facial moisturizers and “barrier repair” creams, its high refractive index also makes it popular in lip care products and color cosmetics to provide a natural, healthy gloss.
Routine Integration
- Synergies: High compatibility with Glycerin for humectant-emollient balance, Squalane for enhanced spreadability, and Phytosphingosine to maximize barrier restoration.
- Conflicts: No known significant ingredient conflicts; safe for use with retinoids, exfoliating acids, and vitamin C.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel and CosIng database recognize these esters as safe for use in cosmetic formulations. Toxicological assessments indicate that the blend is non-irritating to the eyes and skin, even at high concentrations. Clinical studies on similar amino acid-based lipids demonstrate a significant reduction in skin roughness and a measurable increase in hydration levels after 14 days of consistent use. Its biomimetic nature ensures high skin tolerance, making it a preferred choice for compromised or sensitive skin conditions such as atopic dermatitis or rosacea.
Is this ingredient the same as a ceramide?
While it is not a pure ceramide, it is classified as a “pseudoceramide.” It mimics the function and physical structure of ceramides in the skin barrier, providing similar repair benefits at a more accessible formulation profile.
Will this cause breakouts on oily skin?
Current data suggests it has a very low comedogenic potential. Because it mimics the skin’s natural sebum components without being occlusive, it is generally well-tolerated by most skin types, including oily and acne-prone skin.
Why is it used in “barrier” creams?
The ingredient is used because of its ability to form lamellar liquid crystals. This specific structure is the only way to effectively “patch” the gaps in a damaged skin barrier, preventing moisture from escaping and irritants from entering.