Science
Mechanism of Action
This extract acts as an antioxidant, helping to neutralize free radicals that contribute to premature skin aging. It functions as a skin conditioning agent, potentially strengthening the skin's natural protective barrier and improving microcirculation to support a healthier complexion. The natural menthol content provides a characteristic refreshing and cooling sensation. It may exhibit antibacterial effects, assist in regulating sebum production, and reduce pore clogging, promoting a clearer, more matte appearance. The extract also demonstrates soothing and anti-inflammatory properties, with an astringent effect that can visibly tighten pores. Menthol, a significant component, is known to enhance the transdermal penetration of other active ingredients. Studies on related Mentha piperita forms suggest capabilities in accelerating wound healing by upregulating TGF-β gene expression and promoting angiogenesis, as well as inhibiting tyrosinase to manage skin hyperpigmentation.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 No dermal irritation or allergic contact sensitization.
- 02 No skin irritation in vitro.
- 03 Accelerated wound healing, reduced inflammation, increased angiogenesis and epithelialization.
- 04 Strong tyrosinase inhibition.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Optimal stability for related Mentha Piperita extracts and hydrosols is typically observed within a slightly acidic pH range of 4.5 to 6.5.
Conflicts
- High concentrations or use in individuals with sensitive skin may lead to dermal irritation due to its menthol content; patch testing is recommended for sensitive skin types.
- Menthol, a significant component, can enhance the transdermal penetration of other co-formulated ingredients. Formulators must exercise caution as this may affect the safety assessment of other actives, particularly those whose safety is based on limited absorption.
- The concentration of pulegone, a potential toxicant, in Mentha piperita-derived ingredients should not exceed 1%.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that data for Mentha Piperita (Peppermint) Flower/Leaf/Stem Extract are insufficient to determine its safety in cosmetic products. The panel specifically requires composition data, other toxicological endpoints, and skin irritation and sensitization data for this precise ingredient. While other peppermint-derived ingredients have been deemed safe with pulegone levels not exceeding 1%, and the extract is generally recognized as safe (GRAS) by the US FDA for food consumption, these determinations do not directly confirm the safety of this specific stem extract for cosmetic application. The menthol component necessitates caution regarding potential irritation in sensitive individuals and its ability to enhance the penetration of other co-formulated ingredients.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While Mentha Piperita Stem Extract shows promising potential for skin conditioning, antioxidant benefits, and a refreshing feel based on related studies, its specific safety profile in cosmetics requires more targeted research and data as deemed by regulatory bodies.
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