brightening

Vitamin C · 비타민 C

INCI: Ascorbic Acid

Also known as: L-Ascorbic Acid · Pure Vitamin C · Ascorbyl Glucoside · Ethyl Ascorbic Acid · 비타민C

Updated May 2026. Based on public cosmetic-science references (INCI Decoder, CosIng EU, EWG Skin Deep, Paula's Choice) plus Korean product catalog mapping. Editorial summary — not regulatory or medical advice.

What it is

Vitamin C in cosmetics most often appears as L-ascorbic acid (pure form, potent but unstable) or as more stable derivatives (Ascorbyl Glucoside, Ethyl Ascorbic Acid, MAP, SAP, THDA). It is the most-studied topical antioxidant for tone-evening, defense against environmental damage, and collagen-support claims. Formulation pH and packaging matter — opaque, airless, or amber bottles are common.

한국어 설명

화장품의 비타민 C는 가장 강력하지만 불안정한 순수형 L-아스코르브산, 또는 더 안정적인 유도체(아스코르빌 글루코사이드, 에틸 아스코르빌, MAP, SAP, THDA) 형태로 들어간다. 톤 외관 개선·환경 스트레스 방어·콜라겐 지원 클레임의 가장 많이 연구된 외용 항산화제다. 포뮬러 pH와 포장(불투명·에어리스·앰버) 관리가 중요하다.

Best for

  • uneven tone
  • dullness
  • environmental damage
  • early aging signs

Pairs well with

  • Vitamin E
  • Ferulic Acid
  • Hyaluronic Acid
  • Niacinamide

Products with Vitamin C (254)

Catalog matches ranked by data completeness and reviews.

Related answer guides

External references

We do not republish proprietary ingredient databases. Public references above are good starting points for verification — treat this page's structured description as our editorial summary, not a primary regulatory source.

Educational summary for skincare shoppers. Not medical advice. For pregnancy, treatment-related, or condition-specific decisions, consult a qualified clinician.