Science
Mechanism of Action
Glutamic acid primarily operates as a humectant, actively attracting and retaining water from the atmosphere, thereby enhancing skin hydration and sustaining its moisture equilibrium. Biologically, it can be converted into pyrrolidone carboxylic acid (PCA), a crucial component of the skin's Natural Moisturizing Factors (NMFs). Additionally, it contributes to fortifying the skin's protective barrier, exhibits potential antioxidant activity, and functions as a pH adjuster to maintain optimal skin pH in cosmetic products. While some studies suggest a role in inflammation inhibition and wound healing, it's noted that L-glutamic acid may delay repair on damaged skin, whereas D-glutamic acid may accelerate it.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Aqueous solutions of glutamic acid will slowly convert into pyrrolidonecarboxylic acid when stored at room temperature. Its molecular structure, possessing both acidic and alkaline functional groups, enables it to accept various ions, thereby contributing to product stability and allowing it to regulate pH.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed Glutamic Acid's safety. It is recognized as Generally Recognized As Safe (GRAS) by the FDA for use as a direct food additive. Rigorous Human Repeat Insult Patch Test (HRIPT) studies demonstrate that products containing amino acids, including glutamic acid, are neither dermal irritants nor sensitizers. European Cosmetics Regulation also supports its safety for beauty product applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Glutamic acid is a valuable ingredient for comprehensive skin hydration, barrier support, and pH regulation, making it suitable for a wide range of cosmetic formulations due to its excellent safety profile.
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