Vitamin D3 K2 Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Sports Research is the best-performing vitamin d3 k2 brand in July 2026, moving 110,000 units across 2 ASINs for 32.4% of Top 10 volume. Nature Made follows with 50,000 units (14.7%), ahead of Bronson on 50,000 units (14.7%).

With 7 brands splitting the Top 10 and 61.8% 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 $12.48 to $31.73, 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: B0771R5L28 booked 20K units at $14.99, with ▲ 100.0% MoM change. On the growth side, B0H2M1NC5X leads positive momentum with ▲ 400.0% MoM growth on 3K units, with B0F9F5JWXW close behind at ▲ 100.0% MoM on 20K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.