Gosam (Sophora flavescens): effective % & pH 고삼
⏱ 1 min read
⚡ Quick answer: Gosam (Sophora flavescens): effective concentration not standardised — root extracts vary widely in strength, optimal pH 4.0–7.0, evidence Limited. Interesting in a lab, unproven on faces. Persistent or painful acne belongs with a dermatologist.
How much Gosam (Sophora flavescens) actually works? Here's the dosage, pH and evidence — the formulator-level read behind the % on a Korean label.
| Effective % | not standardised — root extracts vary widely in strength |
|---|---|
| Optimal pH | 4.0–7.0 |
| Evidence | Limited |
| Onset | unclear — no reliable timeline established |
What the % on the label really means
Interesting in a lab, unproven on faces. Persistent or painful acne belongs with a dermatologist.
⚠️ Ceiling: Concentrated bitter root extracts can irritate, and there is no agreed effective cosmetic level to aim for.
Gosam (Sophora flavescens) guide →How Gosam (Sophora flavescens) works →
Related K-beauty guides
Try the free tools
🪞 Find your skin type🧴 Build a routine🧪 Decode any INCI list⚗️ What not to mix🔮 Glass Skin Score🩺 Troubleshoot skin🛡️ Where to buy authentic
Explore more K-beauty guides →
⏭ Up next⚗️ Mayu (Horse Oil): effective % & pH 마유
✍️ 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.