Transparent Labs Whey Protein Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Optimum Nutrition is the best-performing transparent labs whey protein brand in July 2026, moving 130,000 units across 4 ASINs for 29.5% of Top 10 volume. THORNE follows with 100,000 units (22.7%), ahead of vital proteins on 90,000 units (20.5%).

With 6 brands splitting the Top 10 and 72.7% 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 $42.99 to $64.25, 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. On the growth side, B0128RSQLC leads positive momentum with ▲ 50.0% MoM growth on 3K units, with B0C81VJ3PZ close behind at ▲ 33.3% MoM on 4K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.