Diet Pills Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Sports Research is the best-performing diet pills brand in July 2026, moving 150,000 units across 2 ASINs for 20.8% of Top 10 volume. Physician's CHOICE follows with 130,000 units (18.1%), ahead of Pure Encapsulations on 100,000 units (13.9%).

Volume is spread across 8 brands, with the top three holding 52.8% between them. No single label controls the shelf, which usually leaves room for a well-differentiated listing to take share without outspending an incumbent. Average selling prices among the leaders run from $21.47 to $27.00, 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: B004RR1FF6 booked 50K units at $10.97, with ▲ 0.0% MoM change. On the growth side, B001TH7K0G leads positive momentum with ▲ 100.0% MoM growth on 40K units, with B0DFHTW5HN close behind at ▲ 50.0% MoM on 30K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.