No.5 Vitamin-Niacinamide Concentrated Serum

Numbuzin's brightening bestseller, a golden serum stacking niacinamide with a vitamin complex and glutathione for dullness and post-blemish marks. The texture is honey-thick but sinks in cleanly, and the before-and-after tone photos flooded Korean beauty apps for a reason. Works best as a slow burn over weeks.

Around $26