The numbuzin No.5 Blemish Farewell Serum comes from a brand that numbers its products instead of naming them, and five is the one people arrive for. Niacinamide sits seventh — Korea's notified brightening active, high enough to be doing real work — and then, right at the tail of a forty-item list, four separate vitamin C derivatives in a row. One reader sums the pitch up as sea buckthorn plus vitamin C, in a formula that leaves out twenty categories of ingredient people worry about.

Korean name: 넘버즈인 5번 잡티 이별 세럼
Size: 50ml