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One Thing

One Thing is a Korean brand built around a radical simplicity premise: one ingredient, one product, no unnecessary additives. Since 2015 the brand has become a cult favorite for users who want extract-level concentration without the full-formula overhead.

DermFND
Verified house
4 of 4 products signed off
Products reviewed
4
Average score
83.0/100
Median price
$14
Top category
toner
Last reviewed
May 2026
Alex Brufsky
Alex Brufsky Founder & Editor
Analysis by DermFND · Last verified May 2026 · Methodology
Verified reviewer
4 products viewing all categories
The DermFND take

One Thing, by the numbers.

One Thing has 4 products in the DermFND database, concentrated in toners and serums. Observed ingredient patterns across these products include centella asiatica, probiotics prebiotics, hyaluronic acid, niacinamide, panthenol, and adenosine. The price range for these items is $14-$16, with an average price of $14. The brand maintains an average DermFND score of 83.0/100. Sample products within the database include Centella Asiatica Extract, Galactomyces Ferment Filtrate, Hyaluronic Acid Complex, and Niacinamide 10%. This data indicates a product profile focused on single-ingredient or concentrated formulations within a specific, low-cost price bracket.

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