Science
Mechanism of Action
This extract fortifies the skin's natural protective barrier and functions as a potent antioxidant, actively neutralizing free radicals and safeguarding against oxidative damage. It promotes blood circulation, thereby improving oxygen supply to skin cells, and imparts soothing, cooling, and refreshing properties, primarily attributed to its menthol content. The ingredient reduces inflammation, provides an astringent effect to tighten pores and regulate oily skin, and exhibits natural antibacterial qualities that aid in preventing pore clogging. Additionally, it helps to restore skin moisture, can elevate TGF-β gene expression crucial for wound healing, and has been observed to suppress eATP levels, which may contribute to improving dermal thinning and wrinkles.
Research
Clinical Evidence
Medium confidence1%
Key findings
- 01 Effective at improving wrinkles by reducing dermal thinning in clinical tests involving 53 and 14 subjects.
- 02 Topical application of M. piperita essence with Vaseline achieved 99.73% wound healing in rats after 14 days, compared to 74.58% with the essence alone.
Transparency
Dusting Analysis
Given its proven efficacy at specific concentrations for targeted benefits like wrinkle reduction and wound healing support, Mentha Piperita Leaf Extract is a functional ingredient. However, exceeding its recommended maximum concentration of 5% in formulations could lead to irritation, particularly for sensitive individuals, due to its menthol content, therefore it is not suitable for 'dusting' at excessively high levels. Additionally, pulegone content must remain below 1%.
The Formula
Formulation
Stability
No specific stability issues were noted in the provided data.
Conflicts
- High concentrations, particularly due to menthol content, can cause irritation, especially for individuals with sensitive skin.
- The pulegone content, a natural component, must not exceed 1% in the final formulation due to toxicity concerns.
- Menthol present in the extract may enhance the dermal penetration of other co-ingredients, necessitating careful safety assessment of the overall formulation.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Mentha Piperita Leaf Extract is safe for cosmetic use, provided the concentration of pulegone, a natural component, does not exceed 1%. Regulatory guidelines generally advise a maximum concentration of 5% in formulations. While typically safe, its menthol content can induce irritation in sensitive individuals or when used at higher concentrations, making patch testing advisable. Furthermore, its potential to enhance the penetration of other ingredients necessitates thorough safety evaluations for co-ingredients in a formulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Mentha Piperita Leaf Extract is a valuable ingredient offering a diverse range of benefits from wrinkle reduction and barrier support to oil control and a refreshing sensation, though precise formulation is crucial to mitigate its moderate irritation potential, particularly for sensitive skin types.
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