Science
Mechanism of Action
This extract functions through several pathways to enhance skin health. Its abundance of antioxidants shields the skin from environmental stressors and free radical damage, which can compromise protein quality and accelerate visible aging. Potent anti-inflammatory agents, including flavonoids and myrtucommulone, reduce redness and irritation. Furthermore, its antibacterial action effectively inhibits problematic organisms like P. acnes, which contribute to breakouts, and suppresses biofilm formation. It also helps balance sebum production, offering an astringent effect that visibly refines pores, and demonstrates anti-glycation activity to support collagen structure for improved firmness and elasticity, potentially extending cellular longevity. The extract has also been shown to inhibit keratinocyte proliferation and lipase activity.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A 9.7 µg/mL concentration demonstrated significant in vitro inhibition of biofilm formation (51% for S. aureus, 70% for M. smegmatis).
- 02 Human clinical trials observed that topical applications of 2.5% and 5% myrtex extract effectively reduced the diameter, pain, and burning sensation associated with recurrent aphthous stomatitis (oral lesions).
- 03 In an in vivo rat model, a 100 mg/kg dose exhibited potent anti-exudative activity, reducing paw edema by over 33%.
- 04 In vitro studies using 1 µg/mL and 3 µg/mL of myrtacin (an ethanolic myrtle product) inhibited human keratinocyte proliferation by 27% and 76%, respectively.
- 05 Ethanolic extracts (Myrtacin) also inhibited the growth of P. acnes strains in vitro, with minimum inhibitory concentrations (MICs) of 4.9 µg/mL and 2.4 µg/mL.
Transparency
Dusting Analysis
Research indicates effective concentrations for both in vitro antibacterial and anti-proliferative actions (e.g., µg/mL range) and in topical human clinical trials (2.5% and 5%), suggesting its use is often supported by demonstrable efficacy rather than minimal inclusion for marketing.
The Formula
Formulation
Stability
Extracts are typically prepared using ethanol/water mixtures. Its stability can be compromised by exposure to air, which may lead to the oxidation of volatile components like limonene and linalool, potentially enhancing their sensitizing properties.
Safety
Safety Profile
Myrtus Communis Leaf Extract is generally well-tolerated in cosmetic applications. However, the presence of volatile components such as 1,8-cineole, limonene, and linalool carries a moderate risk of sensitization upon air exposure due to their oxidation. This can manifest as tightness, dryness, itchiness, or redness. To mitigate this, an aqueous extract is typically free of essential oils and declarable fragrance allergens. The European Cosmetics Regulation recognizes myrtle leaf extract as a safe ingredient, but adherence to manufacturer's usage guidelines is important.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Myrtus Communis Leaf Extract is a valuable ingredient for addressing oily and blemish-prone skin, offering significant antioxidant, anti-inflammatory, and antimicrobial benefits, though formulation to minimize volatile sensitizers is crucial.
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