Science
Mechanism of Action
This active compound mitigates inflammation by inhibiting key pro-inflammatory mediators such as cyclooxygenase, prostaglandin E2, TNF-α, and interleukin-1α, and by modulating the glucocorticoid receptor pathway. Its antioxidant activity stems from increasing heme oxygenase HO-1 expression, reducing lipid peroxidation, and scavenging free radicals, thereby supporting the skin's defense against UV-induced damage. Furthermore, Glycyrrhetinic Acid exhibits antimicrobial properties through bacterial cell membrane disruption, notably against *Staphylococcus aureus* and *Propionibacterium acnes*. It also helps maintain skin integrity by protecting hyaluronic acid and elastin from enzymatic degradation, with debated potential to lighten pigmentation by dispersing melanin and inhibiting tyrosinase at concentrations above 0.5%.
Research
Clinical Evidence
High confidenceOptimal efficacy for various skin concerns is observed within a range of 0.05% for general soothing and conditioning, up to 0.4% for skin recovery, and 0.5% for targeted reduction of UVB-induced erythema and pigmentation.
Key findings
- 01 Demonstrated reduction in erythema and pigmentation induced by UVB light.
- 02 Recommended for soothing and skin-conditioning benefits in topical emulsions and gels.
- 03 Recommended for use in skin recovery formulations.
- 04 Commonly integrated into cosmetic products for its anti-inflammatory, antioxidant, and antimicrobial properties, also noted for treating conditions like atopic dermatitis, pruritus, or acne vulgaris.
Transparency
Dusting Analysis
While Glycyrrhetinic Acid is effective at relatively low concentrations (e.g., 0.05% for soothing benefits), concentrations below this threshold are generally considered insufficient for delivering significant broad skin benefits and may indicate a product where the ingredient is 'dusted' for marketing purposes rather than impactful efficacy.
The Formula
Formulation
Stability
Solid dispersions of Glycyrrhetinic Acid exhibit good stability, with minimal content reduction (approximately 9.8% over 63 days) when stored at room temperature.
Safety
Safety Profile
The CIR Expert Panel determined Glycyrrhetinic Acid to be safe at current use concentrations (up to 2%). It is poorly absorbed through the skin and has shown no irritant or sensitizing potential in clinical tests at concentrations up to 6%. The FDA lists licorice derivatives as Generally Recognized As Safe (GRAS).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Glycyrrhetinic Acid is a valuable ingredient, offering broad anti-inflammatory, antioxidant, and soothing benefits effective across all skin types at precise concentrations, with a strong safety profile.
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