Brightening · Serum
Potassium 4-Methoxysalicylate
Also listed as: 4-methoxysalicylic acid potassium salt, 4msk
Salicylate-family tone active used in Japanese quasi-drug brighteners.
Tone-evening actives like alpha arbutin, tranexamic acid and liquorice fade dark spots and old blemish marks.
- Targets: dark spots
Pairs well with
More brightening actives
Other serum ingredients
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Guidance based on ingredient data, not medical advice.