Science
Mechanism of Action
This ingredient functions exclusively as a fragrance and masking agent within cosmetic formulations. Comprehensive research indicates no specific mechanism of action on the skin that would provide direct skincare benefits, such as moisturizing, antioxidant, or anti-inflammatory effects.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Gamma-undecalactone demonstrates stability in diverse cosmetic bases, including creams, lotions, and powders, generally without causing discoloration. However, its chemical structure is compromised by strong acids, strong alkalis, and potent oxidizing agents, suggesting formulations should maintain a moderate pH range.
Conflicts
- strong acids
- strong alkalis
- strong oxidizing materials
Safety
Safety Profile
Recognized by the U.S. FDA as safe for general or specific limited use in food, gamma-undecalactone also holds FEMA GRAS (No. 3091) status. It is not classified as a declarable EU fragrance allergen. Human volunteer patch tests showed no irritation or sensitization at a 2% concentration in petrolatum. However, transient redness was observed in 5 out of 136 subjects (approximately 3.7%) following 24-48 hours of covered contact with lower concentrations (0.05-0.5%) in different bases. While EWG categorizes it with low concerns for cancer, allergies, and reproductive toxicity, some studies suggest weak endocrine disruption and limited evidence of developmental toxicity. Animal studies indicated severe irritation in rabbits and moderate irritation in guinea pigs, though further details are unavailable.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Gamma-undecalactone is an optional ingredient, primarily incorporated for its fragrance and masking properties, as it provides no direct physiological benefits to the skin and has a generally low, albeit nuanced, safety profile for most individuals.
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References
Sources