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

Nutricost is the best-performing niacinamide 500mg brand in July 2026, moving 13,000 units across 2 ASINs for 28.3% of Top 10 volume. Heliocare follows with 10,000 units (21.7%), ahead of TRU NIAGEN on 7,000 units (15.2%).

With 9 brands splitting the Top 10 and 65.2% 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 $14.95 to $116.00, 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, B00020I7IU leads positive momentum with ▲ 400.0% MoM growth on 500 units, with B08ZSYV1R1 close behind at ▲ 150.0% MoM on 500 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.