Science
Mechanism of Action
This ingredient, an amino-acid (glutamic acid) derivative, possesses a molecular architecture akin to natural ceramides found in the skin. It integrates into the epidermal lipid matrix, forming intercellular lamellar liquid crystals with a bilayer membrane structure. This process actively reinforces the skin barrier, effectively minimizing transepidermal water loss and providing robust protection against external aggressors. Its superior humectant and water-binding capabilities enable it to fill microscopic gaps between skin cells, promoting a firmer epidermal structure and establishing a protective film to retain moisture and shield against irritants.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Clinical studies demonstrate consistent non-irritancy across a broad concentration range. No irritation was observed at 1.5% in a 7-day semi-occlusive patch test with a face cream.
- 02 Products containing 0.5% elicited no skin or eye discomfort when applied to the eye area and lashes in a clinical in-use test.
- 03 An in vitro cell viability assay using EpiSkin™ human epidermis predicted non-irritancy at 1%.
- 04 A Human Repeated Insult Patch Test (HRIPT) at 5.999% confirmed it is neither an irritant nor a sensitizer.
- 05 Full concentration (100%) patch tests conducted over 24 hours yielded negative results for irritation.
Transparency
Dusting Analysis
As an oil-soluble lipid, this ingredient is not typically associated with 'dusting' or leaving a visible powdery residue on the skin surface.
The Formula
Formulation
Safety
Safety Profile
While the Expert Panel for Cosmetic Ingredient Safety (CIR) indicated 'insufficient data' in a tentative report from December 2022 (reviewed May 2023) for general safety under intended conditions of use, maximum reported use concentrations reach 25.6% in leave-on products. It is generally recognized as safe by regulatory bodies such as the European Cosmetics Regulation and the U.S. FDA, with FDA VCRP data showing its inclusion in 327 cosmetic products in 2023. Clinical studies consistently demonstrate a low risk of irritation and sensitization.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Phytosteryl/Octyldodecyl Lauroyl Glutamate is a valuable ceramide-like ingredient, effectively enhancing skin barrier function and hydration with demonstrated low irritation potential across various concentrations.
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References
Sources