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numbuzin No.5 Glutathione C Vitamin Boosting Essential Toner

Ingredient analysis and how the ad lines read

Product photo of numbuzin No.5 Glutathione C Vitamin Boosting Essential Toner

Read on 2026-09-07

What is this product?

Reach for this 200ml numbuzin toner to put a multi-active brightening layer at the very first step of a routine: niacinamide sits fourth of 35 listed ingredients, backed by 3-O-ethyl ascorbic acid at 13, glutathione at 17, pure ascorbic acid at 25 and arbutin at 29, with no fragrance, no drying alcohol and no exfoliating acid printed anywhere on the list. Skip it if you need proof of depth: every active is at an undisclosed concentration, no brand test report was found on the collected pages, and the name leads with glutathione even though niacinamide holds the strongest list position.

What makes it different?

The gap between nameplate and list is the thing to know: the name headlines glutathione plus vitamin C, yet glutathione sits 17th and the two vitamin C species sit 13th and 25th, while niacinamide at position 4 is the best-placed brightening active on the label. The tail is a six-peptide block from position 30 to 35, an unusual construction for a toner. All active concentrations are undisclosed, pH is unpublished on the collected pages, and the marketing story lives in page images whose text could not be extracted, so on the collected pages the statutory ingredient list carries most of what can be checked.

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.

Key ingredient

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: Polyglyceryl-4 Caprate, Hydrogenated Lecithin

Did the ad claims hold up?

We checked 3 lines this product advertises against the ingredient list and public documents. 2 of them look likely, though none are proven outright.

Claims translated from Korean, originals preserved.

likely, not proven2

  • Functional cosmetics review (or report) under the Cosmetics Act completed.
    Korean original

    화장품법에 따른 기능성 화장품 심사(또는 보고)를 필함

  • For all skin types.
    Korean original

    모든 피부 타입용

says nothing1

  • After cleansing, wet a cotton pad with an appropriate amount and wipe from the inside to the outside along the skin texture of the face, or dispense into hands and allow it to absorb into the skin.
    Korean original

    세안 후 적당량을 화장솜에 적셔 얼굴 피부결을 따라 안쪽에서 바깥쪽으로 닦아내거나, 손에 덜어 피부에 흡수시켜줍니다.

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.