Lean Body Protein Shakes 40g Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Core Power is the best-performing lean body protein shakes 40g brand in July 2026, moving 230,000 units across 4 ASINs for 53.5% of Top 10 volume. Premier Protein follows with 140,000 units (32.6%), ahead of Ensure on 40,000 units (9.3%).

With 4 brands splitting the Top 10 and 95.3% 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 $27.39 to $50.97, 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: B0015068TG booked 20K units at $15.16, with ▲ 100.0% MoM change. On the growth side, B0FR9N3W25 leads positive momentum with ▲ 233.3% MoM growth on 10K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.