Yulmu (Job's Tears / Coix): effective % & pH 율무
⏱ 1 min read
⚡ Quick answer: Yulmu (Job's Tears / Coix): effective concentration not standardised — extract and starch levels vary by format, optimal pH 4.0–7.0, evidence Limited. A soft, pleasant grain botanical. For visible tone work, buy niacinamide or a vitamin C derivative instead.
How much Yulmu (Job's Tears / Coix) actually works? Here's the dosage, pH and evidence — the formulator-level read behind the % on a Korean label.
| Effective % | not standardised — extract and starch levels vary by format |
|---|---|
| Optimal pH | 4.0–7.0 |
| Evidence | Limited |
| Onset | 4–8 weeks |
What the % on the label really means
A soft, pleasant grain botanical. For visible tone work, buy niacinamide or a vitamin C derivative instead.
⚠️ Ceiling: Higher starch levels affect texture and finish more than they affect skin.
Yulmu (Job's Tears / Coix) guide →How Yulmu (Job's Tears / Coix) works →
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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.