Magnesium Threonate Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Double Wood Supplements is the best-performing magnesium threonate brand in July 2026, moving 100,000 units across 2 ASINs for 32.5% of Top 10 volume. THORNE follows with 80,000 units (26.0%), ahead of Life Extension on 60,000 units (19.5%).

With 9 brands splitting the Top 10 and 77.9% 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 $23.47 to $30.78, 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: B0CM2NMVJG booked 5K units at $31.99, with ▲ 0.0% MoM change. On the growth side, B0FP55449N leads positive momentum with ▲ 150.0% MoM growth on 1K units, with B0FY7R158H close behind at ▲ 100.0% MoM on 2K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.