Science
Mechanism of Action
This extract functions by several pathways to improve skin health. Its slightly acidic pH contributes to an astringent and purifying effect, aiding in the visible reduction of pore size. It actively modulates sebum gland activity, resulting in a mattified skin appearance. Furthermore, the extract exhibits antibacterial properties, targeting microorganisms like P. acnes which are implicated in acne development. Components akin to those found in its essential oil, such as piperitone, are understood to disrupt bacterial cell structures, while the plant also contributes antioxidant benefits.
Research
Clinical Evidence
Medium confidence5-10%
Key findings
- 01 Recommended for use in skincare at 5-10% concentration for its tonic, cleansing, and purifying properties. The extract is typically prepared as a 20% solution in water and glycerin for formulation.
- 02 Java citronella hydrosol, derived from Cymbopogon schoenanthus, demonstrates a purifying and astringent effect, visibly tightening pores and regulating sebum production to mattify oily skin. Its antibacterial action helps limit the proliferation of microorganisms such as P. acnes, often associated with acne.
- 03 The essential oil of Cymbopogon schoenanthus exhibits potent antibacterial and antifungal actions, with measured MIC values against bacteria like E. coli (9.37 μg/ml), S. aureus (4.69 μg/ml for MRSA), and K. pneumoniae (2.34 mg/ml for MSSA).
Transparency
Dusting Analysis
No specific data is available to indicate if this ingredient is commonly 'dusted' or has a known dusting threshold.
The Formula
Formulation
Stability
For optimal preservation, the extract should be stored in a cool, dry, and light-protected environment. Hydrosol forms are susceptible to oxidation and are typically stable for approximately 6 months after opening, ideally under refrigeration.
Conflicts
- Contains declarable fragrance compounds (e.g., citral, limonene, geraniol, farnesol) that can act as contact allergens for susceptible individuals.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) has not specifically evaluated Cymbopogon Schoenanthus Leaf/Stem Extract. Toxicity studies on the essential oil in mice indicate low acute oral toxicity (LD50 > 2 g/kg). While the hydrosol form is considered safe for pregnant/breastfeeding individuals and children, explicit safety data for the leaf/stem extract itself in these populations is not detailed. EWG's Skin Deep rates the ingredient with low overall concerns, though it notes limited evidence of potential irritation (skin, eyes, lungs) and the presence of declarable fragrance allergens like citral, limonene, geraniol, and farnesol.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Cymbopogon Schoenanthus Leaf/Stem Extract is a valuable botanical ingredient, particularly for oily and blemish-prone skin, offering proven purifying, astringent, and sebum-regulating benefits, though careful consideration of its potential allergen content is warranted for sensitive individuals.
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