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

Nature Made is the best-performing vitamin b brand in July 2026, moving 80,000 units across 3 ASINs for 33.3% of Top 10 volume. Nature's Bounty follows with 70,000 units (29.2%), ahead of THORNE on 40,000 units (16.7%).

With 6 brands splitting the Top 10 and 79.2% 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 $10.77 to $25.50, 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, 2 ASINs forced its way in: B005DXM32M booked 10K units at $10.65, with ▲ 0.0% MoM change. On the growth side, B006BY0JPA leads positive momentum with ▲ 100.0% MoM growth on 8K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.