Science
Mechanism of Action
This extract operates via multiple pathways: its natural alpha hydroxy acids (AHAs), including citric and malic acid, facilitate the gentle removal of dead skin cells, encouraging cellular turnover for smoother, brighter skin. Rich in polyphenols, flavonoids, vitamin C, and other antioxidants, it actively neutralizes free radicals, mitigating environmental damage and supporting anti-aging efforts. Furthermore, it aids in skin hydration and nourishment through its vitamin and mineral profile, functioning as a conditioning agent to restore elasticity and reduce flakiness in dry or damaged skin.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Demonstrated minimum inhibitory concentration (MIC) against various microorganisms, including Staphylococcus aureus and Escherichia coli, at concentrations between 0.05% and 0.1% in in vitro studies, indicating antibacterial properties.
- 02 Proved non-cytotoxic in human glioblastoma cell lines (U87 and LN18) at concentrations up to 0.04% (400 µg/mL) over a 48-hour period.
Transparency
Dusting Analysis
The Cosmetic Ingredient Review (CIR) board restricts the concentration of 5-methoxypsoralen (5-MOP) in leave-on cosmetic products to a maximum of 0.0015% (15 ppm). While the specific 5-MOP content within Microcitrus Australis Fruit Extract is not detailed, this stringent safety limit may necessitate formulations using the extract at concentrations that could be suboptimal for achieving its full range of beneficial effects from AHAs and antioxidants on the skin.
The Formula
Formulation
Stability
Containing natural acids, this extract is likely stable within acidic pH ranges. It typically presents as a viscous liquid, with colors varying from transparent to pale yellow.
Conflicts
- Avoid combination with volatile fragrance components, which can elevate the risk of skin irritation.
- Concomitant use with other chemical exfoliants may increase irritation potential, particularly for very sensitive skin.
- Must be meticulously formulated to ensure it is non-sensitizing and non-irritating.
Safety
Safety Profile
The CIR has deemed Microcitrus Australis Fruit Extract safe for cosmetic use, provided leave-on products do not exceed 0.0015% 5-methoxypsoralen (5-MOP) and the overall formulation is non-sensitizing and non-irritating. The raw fruit is recognized as safe for food consumption (GRAS).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Microcitrus Australis Fruit Extract is a valuable ingredient, offering gentle exfoliation, antioxidant protection, and skin conditioning benefits, though its formulation requires strict adherence to CIR safety limits concerning 5-MOP content to avoid potential irritation.
Related
Similar Ingredients
Finding similar ingredients…