Ferulic Acid: effective % & pH 페룰릭애씨드
⏱ 1 min read
⚡ Quick answer: Ferulic Acid: effective concentration 0.5–1%, optimal pH 2.5–3.5 — the pH the L-ascorbic acid beside it demands; the patented C+E+ferulic sits near 2.5, evidence Moderate. Do not shop for ferulic alone — its value is in what it does for the vitamin C beside it.
How much Ferulic Acid actually works? Here's the dosage, pH and evidence — the formulator-level read behind the % on a Korean label.
| Effective % | 0.5–1% |
|---|---|
| Optimal pH | 2.5–3.5 — the pH the L-ascorbic acid beside it demands; the patented C+E+ferulic sits near 2.5 |
| Evidence | Moderate |
| Onset | weeks |
What the % on the label really means
Do not shop for ferulic alone — its value is in what it does for the vitamin C beside it.
⚠️ Ceiling: The Duke work behind the trio used 0.5% ferulic acid alongside 15% L-ascorbic acid and 1% tocopherol — the 1% belongs to the vitamin E, not to this.
Ferulic Acid guide →How Ferulic 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.