Mouthwash Whitening Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

TheraBreath is the best-performing mouthwash whitening brand in July 2026, moving 190,000 units across 3 ASINs for 29.7% of Top 10 volume. Crest follows with 170,000 units (26.6%), ahead of Colgate on 100,000 units (15.6%).

With 5 brands splitting the Top 10 and 71.9% 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 $8.94 to $25.65, 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: B0758F8KDC booked 50K units at $16.97, with ▲ 400.0% MoM change. On the growth side, B01L4ND4O0 leads positive momentum with ▲ 100.0% MoM growth on 20K units, with B001ET76AI close behind at ▲ 33.3% MoM 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.