Science
Mechanism of Action
This extract acts as a potent antioxidant, neutralizing reactive oxygen species (ROS) and boosting endogenous defense mechanisms, including glutathione and key oxidative defense enzymes like superoxide dismutase and catalase, partially via Nrf2 activation. It addresses photoaging by promoting procollagen type I production and inhibiting matrix metalloproteinase-1 (MMP-1) activity and transcription factor AP-1, crucial for maintaining skin structural integrity. Additionally, it offers anti-wrinkle potential through the inhibition of collagenase, elastase, tyrosinase, and hyaluronidase. Its anti-inflammatory action mitigates UV-induced erythema, while anti-allergic effects are mediated by suppressing mast cell degranulation and modulating intracellular signaling pathways. The extract also exhibits antimicrobial activity and functions as an antiseborrhoeic agent.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Showed no significant cytotoxicity on human dermal fibroblasts. At 100 μg/mL, it increased procollagen type I production by up to 50% and decreased reactive oxygen species (ROS) by 43% in UVB-irradiated cells, suggesting potent anti-photoaging effects.
- 02 Significantly inhibited the degranulation of RBL-2H3 cells in a concentration-dependent manner without cytotoxicity, indicating anti-allergic activity.
- 03 A lipolotion containing coriander oil significantly reduced UV-induced erythema in vivo, demonstrating a mild anti-inflammatory effect.
- 04 Exhibited concentration-dependent antioxidant activity by inhibiting the DPPH radical, with an IC50 value of 31.98 μg/mL.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The stability of components rich in linalool, such as those found in coriander oil, is optimized by minimizing peroxide levels; the inclusion of antioxidants like 0.1% BHT or alpha-tocopherol during raw material production is recommended, ensuring a maximum peroxide level of 20 mmol/l in finished products. Notably, high concentrations (e.g., 1000 ppm) of ethanolic coriander extract may act as a pro-oxidant in certain oil formulations, whereas lower concentrations (250, 500 ppm) have been shown to delay oxidative changes, indicating a concentration-dependent effect on oxidative stability.
Synergies
- Antioxidants (e.g., BHT, alpha-tocopherol) for enhanced stability.
Conflicts
- High peroxide levels (for components rich in linalool)
- High concentrations may exhibit pro-oxidant effects in certain oil formulations
Safety
Safety Profile
Coriander Leaf Oil (Coriandrum Sativum L.) is recognized as safe (GRAS) by the FDA as a flavor and fragrance agent. While specific Cosmetic Ingredient Review (CIR) or Scientific Committee on Consumer Safety (SCCS) reports for 'Coriandrum Sativum Leaf Extract' are unavailable, the European Chemicals Agency (ECHA) notes 'Limited evidence of dermal toxicity or allergies' for Coriandrum Sativum Extract. However, a study evaluating an aqueous *Coriandrum sativum* extract at high concentrations indicated mutagenicity in Ames tests, reduced human cell survival through apoptosis and necrosis, and caused severe malformations in chicken embryonic development, suggesting potential concerns at elevated concentrations or in specific forms of the extract.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Coriandrum Sativum Leaf Extract is a valuable ingredient, demonstrating significant antioxidant, anti-photoaging, and anti-inflammatory benefits, though meticulous consideration of its concentration is imperative due to reported mutagenicity concerns at very high levels.
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