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COSRX

COSRX Low pH Good Morning Gel Cleanser

Ingredient analysis and how the ad lines read

Read on 2026-09-25

What is this product?

A 150 ml clear gel cleanser from the Korean brand COSRX, sold on the brand's own store as a weakly acidic morning wash. The 25 entry list washes with cocamidopropyl betaine, sodium lauroyl methyl isethionate and polysorbate 20, with no sulfate named entry, and adds seven plant extracts led by styrax, tea tree leaf oil, allantoin and betaine salicylate, which the brand calls BHA. No fragrance entry or ethanol is printed. The page describes the pH as near 5 to 6 and shows litmus paper, but prints no measured value. Irritation and satisfaction claims carry no test details. No lived use reports were collected.

What makes it different?

A gel format morning wash whose main differences from the brand's landed salicylic acid foam are the salicylate form, betaine salicylate at 19th rather than salicylic acid, and a surfactant set led by the betaine and an isethionate. A brand scan found 18 landed records for this brand besides this one. The trade-offs: tea tree leaf oil for reactive skin, and a weak acidity claim with no printed pH value.

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.

This brand publishes its ingredient list in Korean only. Names below are the matching INCI names from the Korean Cosmetic Association ingredient dictionary, except 1 with no dictionary entry, left in Korean.

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

We could not place these in the list above: 티트리잎오일, 폴리솔베이트20, 베타인살리실레이트

Did the ad claims hold up?

We checked 22 lines this product advertises against the ingredient list and public documents. 2 of them hold up. The rest are only partly right or have nothing behind them.

Claims translated from Korean, originals preserved.

backed by evidence2

  • Contains BHA (Betaine Salicylate), Styrax japonicus branch/fruit/leaf extract.
    Korean original

    BHA(베타인살리실레이트), 때죽나무가지/열매/잎 추출물 함유.

  • Transparent gel formulation
    Korean original

    투명한 젤 제형

likely, not proven8

  • The problem may not be cleansing power, but the disrupted skin pH balance.
    Korean original

    문제는 세정력이 아니라 무너진 피부 pH 밸런스일 수 있습니다.

  • Start of skin without tautness after washing & low-irritation cleansing
    Korean original

    세안 후 당김없는 피부의 시작 & 자극이 적은 세안

  • COSRX Low pH Good Morning Gel Cleanser helps with comfortable cleansing by reducing irritation with a low-pH formula that considers the skin's healthy balance.
    Korean original

    코스알엑스 약산성 굿모닝 젤 클렌저는 피부의 건강한 밸런스를 고려한 약산성 포뮬러로 자극은 줄이고 편안한 세안을 도와줍니다.

  • Healthy skin maintains a low-pH state at pH 4.5~6.5.
    Korean original

    건강한 피부는 pH 4.5~6.5 수준의 약산성 상태를 유지합니다.

  • Gentle cleansing power for daily use, cleanly removing impurities and sebum without over-cleansing
    Korean original

    매일 사용 가능한 순한 세정력 과도한 세정 없이 노폐물과 피지만 깔끔하게 제거

  • Soft gel-type feel, minimizes friction with rich and dense foam
    Korean original

    젤 타입의 부드러운 사용감 풍성하고 촘촘한 거품으로 마찰 부담 최소화

  • If squeaky-clean alkaline cleansers are irritating and drying, switch to the smooth and moist Good Morning Gel Cleanser that reduces skin irritation and gently removes impurities!
    Korean original

    뽀득뽀득 알칼리성 클렌저가 자극적이고 건조하다면, 피부 자극을 줄이고 순하게 피부 노폐물을 제거하여 매끄럽고 촉촉한 굿모닝 젤 클렌저로 바꿔보세요!

  • Cleansing with low skin irritation, soft moisturizing feel
    Korean original

    피부에 자극이 적은 클렌징, 부드러운 보습감

partly backed6

  • Global cumulative sales surpass 30 million*
    Korean original

    글로벌 누적판매 3,000만돌파*

  • Recommended for morning cleansing due to low irritation
    Korean original

    저자극으로 아침 세안으로 추천

  • A feel suitable even for sensitive skin
    Korean original

    민감성 피부에도 적합한 사용감

  • Completed skin low-irritation test for less irritation and clean cleansing!
    Korean original

    피부 저자극 테스트를 완료하여 자극은 적게, 세정은 말끔하게!

  • Confirm low-pH with pink litmus paper!
    Korean original

    핑크색 리트머스지로 약산성 확인!

  • Formulated with purifying botanical ingredients, this low pH formula works to soothe, refresh, and soften the skin without the stripping feeling.

overstated ad line2

  • Protect the skin barrier and cleanly remove impurities with low-pH cleansing!
    Korean original

    약산성 세안으로 피부 장벽은 지키고 노폐물은 깨끗하게 제거하세요!

  • A low-pH gel close to skin's pH 5~6 gently cares for troubled skin without damaging the skin barrier.
    Korean original

    피부와 비슷한 pH5~6에 가까운 약산성 젤이 피부 장벽에 손상을 주지 않고 순하게 고민 피부를 케어합니다.

no evidence3

  • Low-pH Good Morning Gel Cleanser selling 1 every 23 seconds
    Korean original

    23초에 1개씩 팔리는 약산성 굿모닝 젤 클렌저

  • The representative low-pH cleanser that shines at Amazon Best Sellers #1
    Korean original

    아마존 베스트 셀러즈 1위에 빛나는 대표 약산성 클렌저

  • 100% satisfaction after use
    Korean original

    사용 후 만족도 100%

says nothing1

  • Good Morning Gel Cleanser born from customer requests
    Korean original

    고객의 요청으로 탄생한 굿모닝 젤 클렌저

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.