Science
Mechanism of Action
This extract, which shares bioactive compounds with the well-studied Coix seeds, operates through multiple pathways to improve skin vitality. Its rich content of phenols and flavonoids imparts significant antioxidant properties, safeguarding the skin against pro-aging damage from external factors. It functions as a skin-brightening agent by inhibiting excess pigment production, thereby reducing the visibility of dark spots and discolorations. Beyond brightening, it offers substantial skin conditioning, calming effects through the inhibition of tryptase expression and histamine release, and deep hydration. Furthermore, the extract is replete with proteins, essential amino acids, calcium, iron, and B vitamins, aiding in gentle exfoliation by facilitating waste removal and promoting natural skin regeneration and a strengthened skin barrier.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 An ethanolic extract of Coix lacryma-jobi L. var. ma-yuen Stapf. seeds caused 48.4% inhibition of tyrosinase activity at 1 mg/mL in B16F10 melanocytes, suggesting potential for skin brightening by reducing excess pigment.
- 02 Coix sprouts extract, at concentrations between 25-50 µg/mL, effectively inhibited tryptase expression and histamine release in HMC-1 cell lines, indicating anti-pruritic and immunomodulatory benefits for skin conditions like atopic dermatitis.
Transparency
Dusting Analysis
There is no available data to suggest that Coix Lacryma-Jobi Ma-Yuen Root Extract is commonly used at ineffective 'dusting' percentages or has a known red flag concentration in cosmetic formulations.
The Formula
Formulation
Stability
Optimal usage levels for this specific root extract in cosmetics are not yet firmly established. It is frequently incorporated into blends with other natural ingredients and ferments. The majority of beneficial polyphenolic compounds found in Coix are water-soluble.
Synergies
- Often formulated as part of complex natural ingredient and ferment blends, suggesting potential synergistic benefits when combined with other active botanicals.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) has assessed 'Coix Lacryma-Jobi (Job's Tears) Seed Oil' as safe ('S' status) for cosmetic use. However, 'Coix Lacryma-Jobi Ma-Yuen ROOT EXTRACT' specifically has not been reviewed by CIR, SCCS, or FDA in the provided research. Acute oral toxicity tests on a hot water extract of Coix lacryma-jobi seeds showed no significant toxicity in rats. A study on the root extract indicated autotoxic effects (inhibiting plant growth) at concentrations of ≥ 0.1 g/mL to the plant itself, which is not applicable to human skin safety.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This root extract demonstrates promising multi-functional benefits for skin health, including antioxidant, brightening, and calming properties, but requires further direct clinical and safety assessment for specific use as a standalone cosmetic ingredient.
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References
Sources