ONE THING Niacinamide 10% Toner
Ingredients and claims, checked
Last checked September 6, 2026
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What is it like at a glance?
What is this product?
- Key ingredients
- Niacinamide 10%
- When
- Morning and evening
A toner that preps skin after cleansing for the next step, in a 150ml bottle. It has a watery texture.
Who is it for?
Good for
- Dehydrated oily skin
- Dull, uneven skin tone
Less suited to
- Sensitive skin
- Skin with a weakened barrier
What's good?
Good points
- Contains Niacinamide 10%
How do you use it?
- Pairs well with
- An existing toner or cream that this product is mixed into
- A bland moisturiser applied afterwards
- Don't combine with
- Another niacinamide product in the same routine
- An exfoliating acid applied in the same session
What is in it?
The full ingredient list as the brand publishes it, in the printed order. Tap a name to read 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.
Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.
What the claims add up to
- Don't count on:
- a brighter skin tone
See each claim, checked (2)
Claims, checked
However, because it is highly concentrated, please add a small amount (up to 10%) to the skin or cream you are using, and if it feels fine, gradually increase it.
plausible, not testedThe answer for dark and dull skin!
overstated
We quote each claim exactly as the brand published it, then check it against the ingredient list and the brand's own documents.
Which articles cover it?
Articles on this site that write about this product.
- Minimalism, counted against what a formula actually needsFour ingredient names appear on most Korean labels we hold. Knowing which four tells you how short a short list can honestly get, and when short is a signal.
- Korean products for the marks a breakout leaves behindMarks are a pigment question, not a blemish question. Four Korean products with their disclosed tone actives, including one whose own directions contradict.