Cosrx Peptide Serum Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

The Ordinary is the best-performing cosrx peptide serum brand in July 2026, moving 220,000 units across 3 ASINs for 45.8% of Top 10 volume. medicube follows with 110,000 units (22.9%), ahead of COSRX on 40,000 units (8.3%).

With 7 brands splitting the Top 10 and 77.1% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $15.12 to $18.50, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B0C9DXGXZ3 booked 20K units at $32.00, with ▲ 0.0% MoM change. On the growth side, B0GCC2JV65 leads positive momentum with ▲ 33.3% MoM growth on 40K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.