Coix Lacryma-Jobi Ma-Yuen Seed
INCI: COIX LACRYMA-JOBI MA-YUEN SEED
Reviewed by Kate · Last updated 14 Aug 2026
A traditional seed extract with emerging evidence for skin-calming and conditioning properties
Best For Skin Types
All, Sensitive
Addresses
Usage Frequency
Daily
What Is Coix Lacryma-Jobi Ma-Yuen Seed?
Coix Lacryma-Jobi Ma-Yuen (commonly known as adlay) is the seed of a grass native to Asia, where it has been used in traditional Chinese medicine for centuries. In skincare, it typically appears as an extract or seed powder that functions primarily as a skin conditioner.
The ingredient contains compounds including phytosterols and phenolic substances that appear to interact with skin cells and inflammatory pathways, though the precise mechanisms in topical skincare are not yet fully understood.
How It Works
Adlay appears to work through multiple pathways. Its phytosterol and phenolic compounds can interact with inflammatory signalling molecules in skin, potentially reducing the release of pro-inflammatory cytokines that drive redness and sensitivity. This makes it particularly relevant for reactive or irritated skin states.
As a conditioner, it also forms a protective layer on the skin surface and draws moisture into the outer layers, supporting hydration and barrier health. The ingredient's traditional use for skin conditions like chapped skin and warts aligns with these conditioning and anti-inflammatory mechanisms, though modern skincare applications typically focus on general soothing and conditioning rather than therapeutic claims.
Clinical Evidence & References
Research into adlay has primarily focused on internal consumption and cell line studies rather than topical skincare application. In vitro research demonstrates anti-inflammatory, anti-allergic, and antioxidant activity, with studies showing it can reduce inflammatory markers like IL-4, IL-5, and TNF-α in experimental models. This suggests potential for calming skin, though these findings are not yet directly translated to human skin studies.
Evidence for use in topical skincare is limited. Most research has examined extract potency rather than efficacy at typical cosmetic concentrations. Further human clinical trials would be needed to confirm benefits in finished skincare products. Current use is largely based on traditional application and preliminary laboratory findings rather than robust dermatological evidence.
Published Research
How to Use
Adlay typically appears in serums, toners, and moisturisers at relatively low concentrations. It is generally combined with other skin-conditioning or soothing ingredients for additive effect. Apply to clean skin as part of your regular routine; there is no evidence to suggest it requires special timing or sequencing, though layering it with other hydrating ingredients may optimise its conditioning benefits.
Safety & Precautions
Frequently Asked Questions
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