Science
Mechanism of Action
Endogenously formed during the peroxidation of polyunsaturated fatty acids, trans-2-nonenal actively reduces the viability of human keratinocytes and initiates their programmed cell death (apoptosis). Studies in a three-dimensional epidermal equivalent model further reveal its ability to decrease epidermal thickness and the quantity of proliferative cells. This aldehyde can also covalently modify proteins by reacting with specific lysine residues.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 In vitro and ex vivo investigations have demonstrated that trans-2-nonenal decreases the viability of cultured human keratinocytes and promotes their apoptosis. It has also been shown to reduce the thickness and number of proliferative cells in a three-dimensional epidermal equivalent model.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As an aldehyde, trans-2-nonenal requires careful storage. It should be kept away from light in a tightly closed container, in a cool, dry environment, as it is sensitive to air. Regular verification of its quality is essential to maintain freshness and intensity.
Safety
Safety Profile
While not formally reviewed by the CIR for cosmetic safety, the FDA has identified 2-Nonenal (including trans-2-Nonenal) as a synthetic flavoring substance no longer permitted in food. Although Environment Canada deems it unlikely to be toxic, and ECHA noted limited evidence of dermal toxicity or allergies, it carries hazard statements (H315, H319) indicating it 'Causes skin irritation' and 'Causes serious eye irritation.' The IFRA 51 standard permits its use without restriction for fragrance applications in category 4.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Given its established high irritancy and demonstrated detrimental effects on keratinocyte viability and epidermal structure, trans-non-2-enal is not recommended for Moumoujus skincare formulations.
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References
Sources