Vitamin B12 Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Nature's Bounty is the best-performing vitamin b12 brand in July 2026, moving 70,000 units across 2 ASINs for 26.9% of Top 10 volume. Nature Made follows with 70,000 units (26.9%), ahead of Triquetra Health on 50,000 units (19.2%).

With 6 brands splitting the Top 10 and 73.1% 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 $9.55 to $21.99, 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, B006BY0JPA leads positive momentum with ▲ 100.0% MoM growth on 8K units, with B0C5TZCQG3 close behind at ▲ 66.7% MoM on 5K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.