Magnesium Glycinate 500mg Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Pure Encapsulations is the best-performing magnesium glycinate 500mg brand in July 2026, moving 170,000 units across 2 ASINs for 26.6% of Top 10 volume. Nature's Bounty follows with 120,000 units (18.8%), ahead of THORNE on 80,000 units (12.5%).

Volume is spread across 8 brands, with the top three holding 57.8% between them. No single label controls the shelf, which usually leaves room for a well-differentiated listing to take share without outspending an incumbent. Average selling prices among the leaders run from $11.13 to $36.75, 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, B0D92XKTCY leads positive momentum with ▲ 100.0% MoM growth on 20K units, with B00151G8L8 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.