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COSRX

COSRX AC Collection Calming Foam Cleanser

Ingredient analysis and how the ad lines read

Read on 2026-09-30

What is this product?

COSRX AC Collection Calming Foam Cleanser is a 150 mL foam cleanser from a Korean brand, filed as an acne-prone skin relief functional cosmetic. Its 24 printed entries form a fatty acid and potassium hydroxide soap base with a betaine, glycerin second, salicylic acid 14th at a copy-stated 5,000 ppm, and three centella derived entries last. Lavandin oil and two fragrance allergen names are printed, with no fragrance entry. It is a salicylic acid foam: the exfoliating acid is the 14th of nine acid suffix entries, the rest being fatty acids and centella components. Soothing, gentle and without irritation wording comes with no test on the store page text.

What makes it different?

A daily soap based foam that pairs salicylic acid under a statutory acne relief filing with three centella derived entries at the end of the list. The trade off is soft claims about gentleness and soothing with no test shown, on a base that a dry or reactive skin may find tight.

What is in it?

The full ingredient list as the brand publishes it, in the printed order. Each name links to what we know about that ingredient.

Key ingredientWorth a closer look

Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.

Did the ad claims hold up?

We checked 13 lines this product advertises against the ingredient list and public documents. Here is how they read: backed by evidence: 1 · likely, not proven: 1 · partly backed: 6 · overstated ad line: 1 · no source confirms it: 3 · says nothing: 1.

Claims translated from Korean, originals preserved.

backed by evidence1

  • Functional cosmetics for alleviation of acne-prone skin
    Korean original

    여드름성 피부 완화 기능성 화장품

likely, not proven1

  • Dead skin cell care, skin waste removal
    Korean original

    각질 케어, 피부 노페물 제거

partly backed6

  • Soft foam gently cares for skin waste, sebum, and dead skin cells
    Korean original

    부드러운 거품이 피부 노폐물, 피지, 각질을 순하게 케어

  • A refreshing cleansing foam that makes sensitive skin clear and clean, helping to relieve acne-prone skin
    Korean original

    민감한 피부를 맑고 깨끗하게 해주어 여드름성 피부 완화에 도움을 주는 산뜻한 클렌징 폼

  • Dead skin cell care, skin soothing
    Korean original

    각질 케어, 피부진정

  • The salicylic acid contained at 5,000ppm gently removes skin with accumulated waste,
    Korean original

    5,000ppm 함유된 살리실산이 노폐물이 쌓인 피부를 순하게 제거해 주며

  • Salicylic acid that melts away skin waste is contained at 5,000ppm, helping to gently calm troubled skin
    Korean original

    피부 노폐물을 녹여주는 살리실산이 5,000ppm 함유되어 고민 피부를 순하게 잠재우는 데 도움

  • CentellAC-RX Complex formulated with 3 key Centella asiatica ingredients helps soothe angry skin
    Korean original

    3가지 주요 센텔라아시아티카 성분으로 처방한 CentellAC-RX Complex가 성난 피부 진정에 도움

overstated ad line1

  • Rich and dense foam formula for gentle deep cleansing with no skin irritation
    Korean original

    풍성하고 쫀쫀한 거품 포뮬라로 피부 자극 없이 순하게 딥 클렌징

no source confirms it3

  • CentellAC-RX Complex soothes delicate and sensitive skin.
    Korean original

    CentellAC-RX Complex이 예민하고 민감한 피부를 진정시켜줍니다.

  • For those with troubled skin who feel dryness after cleansing
    Korean original

    고민 피부지만 세안 후 건조함을 느끼시는 분

  • #ForStrongIrritationLowIrritation
    Korean original

    #센자극엔저자극

says nothing1

  • Skin clarity, skin protection, skin soothing
    Korean original

    피부 맑음, 피부 보호, 피부 진정

Each line is quoted as the brand published it, and each one was read on its own against the ingredient list and the documents the brand publishes.

How we read these lines

What else is worth seeing?

Products we read alongside this one.