Science
Mechanism of Action
This ingredient operates through multifaceted biological pathways to optimize skin health. Its high concentration of antioxidants, including potent flavonoids and vitamin C, effectively neutralizes free radicals, thereby minimizing oxidative damage and contributing to a more youthful appearance. The extract demonstrates significant inhibitory activity against collagenase and elastase enzymes in vitro, crucial for preserving the skin's structural integrity, elasticity, and preventing sagging. Furthermore, its polymethoxyflavones are recognized for their ability to suppress tyrosinase localization to melanosomes, which inhibits melanogenesis and contributes to a visible skin-brightening effect, diminishing the appearance of hyperpigmentation and promoting an even skin tone. Natural acids within the extract provide gentle exfoliation, encouraging cellular renewal for smoother skin. It also possesses antibacterial and anti-inflammatory properties, making it beneficial for managing oil production and supporting problematic skin conditions.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A hot alcoholic extract of Citrus reticulata (CR HAE) exhibited strong anti-collagenase activity in an in vitro assay, with an effective concentration (EC50) of 329.33 ± 6.38 μg/ml.
- 02 CR HAE also demonstrated strong anti-elastase activity in an in vitro assay, with an EC50 of 3.22 ± 0.24 mg/ml, indicating its potential to prevent elastin degradation.
- 03 A 0.1% sweet orange (Citrus sinensis L.) peel extract cream, from a related citrus species, was found to be safe, well-tolerated, and effective in improving axillary post-inflammatory hyperpigmentation over an eight-week period in a human study, with no reported adverse effects.
- 04 Low concentrations (1 and 100 μg/mL) of Citrus reticulata peel extract induced cell proliferation in a RAW 264.7 macrophage cell line, suggesting regenerative potential.
- 05 Higher concentrations (500, 750, and 1000 μg/mL) of Citrus reticulata peel extract significantly decreased cell viability in the same RAW 264.7 macrophage cell line, indicating a concentration-dependent effect.
Transparency
Dusting Analysis
The Formula
Formulation
Conflicts
- Must be formulated in leave-on products to contain no more than 15 ppm (parts per million) of 5-methoxypsoralen due to its potential phototoxicity, requiring careful sourcing and purification of the extract.
Safety
Safety Profile
For Citrus Reticulata (Tangerine) Peel Extract, topical use is deemed safe up to 0.01%, provided the final product is rigorously formulated to be non-sensitizing and non-irritating. Importantly, leave-on cosmetic products must strictly adhere to a maximum concentration of 15 ppm of 5-methoxypsoralen to prevent photosensitivity reactions. The CIR Expert Panel has determined citrus peel-derived ingredients are safe in cosmetics when these specific concentration and impurity limitations are met.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CITRUS TACHIBANA/RETICULATA PEEL EXTRACT is a valuable multi-functional ingredient offering significant antioxidant, anti-aging, and brightening benefits, but its application requires precise formulation to adhere to strict concentration limits and phototoxicity precautions.
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