TXA Niacinamide Serum — 30ml

5% tranexamic acid, 10% niacinamide and 2% arbutin — Medicube's highest TXA concentration, aimed squarely at dark spots, post-acne marks and uneven tone. A ten-weight hyaluronic complex holds moisture for 72 hours while panthenol and coral moss keep the whole thing quiet. Lightweight, fragrance-free, low-irritation.

THE RITUAL — After toner. A few drops onto the marks you want gone, spreading outward from there. Morning and night.

Why we chose it. Brightening actives usually cost you comfort. This one stacks three of them at percentages that mean something and still reads gentle — which matters, because fading a dark spot is a months-long job and nothing works if you stop.