3-O-Ethyl Ascorbic Acid: effective % & pH 에칠아스코빌에텔
⏱ 1 min read
⚡ Quick answer: 3-O-Ethyl Ascorbic Acid: effective concentration 1–5% in serums; Korea's MFDS notified it for brightening claims in the 1–2% region, optimal pH 5.0–7.0, evidence Moderate. If the box carries Korea's 기능성화장품 mark for 미백, the concentration is regulated. A big number without that mark is just a number.
How much 3-O-Ethyl Ascorbic Acid actually works? Here's the dosage, pH and evidence — the formulator-level read behind the % on a Korean label.
| Effective % | 1–5% in serums; Korea's MFDS notified it for brightening claims in the 1–2% region |
|---|---|
| Optimal pH | 5.0–7.0 |
| Evidence | Moderate |
| Onset | 8–12 weeks |
What the % on the label really means
If the box carries Korea's 기능성화장품 mark for 미백, the concentration is regulated. A big number without that mark is just a number.
⚠️ Ceiling: Higher percentages are a marketing race rather than an evidenced improvement, and above the usual range it stings more without clear extra benefit.
3-O-Ethyl Ascorbic Acid guide →How 3-O-Ethyl Ascorbic Acid 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.