Best-selling diet & sports nutrition brands on Amazon

By estimated revenue, Optimum Nutrition is the best-selling diet & sports nutrition brand on Amazon right now, at roughly $5.6M/mo from 5 products in the Diet & Sports Nutrition Best Sellers top 100 (best position #5). By estimated units, Nutricost sells the most, about 243K a month, usually at a lower price per unit. These are SuppRanked's modeled estimates from public Amazon Best Sellers ranks and list prices (October 15, 2026), not official Amazon sales data.

On October 15, 2026 the #1 product in Amazon's Diet & Sports Nutrition Best Sellers list was LMNT Zero Sugar Electrolytes - Raspberry Salt | Drink Mix | 30-Count from LMNT, with an estimated 54.1K units and ~$2.4M in revenue per month. Ranks change hourly, so check Amazon for the live list.

69 distinct brands have at least one product in the Diet & Sports Nutrition top 100. The 10 biggest by estimated revenue account for about 46% of the list's estimated sales, and the top 3 for about 21%.

We estimate the top 100 diet & sports nutrition products together bring in about $78M a month at list price, before returns, discounts and fees. Treat it as an order-of-magnitude figure. These are SuppRanked's modeled estimates from public Amazon Best Sellers ranks and list prices (October 15, 2026), not official Amazon sales data.

We read the public Amazon Best Sellers list daily, match each product to its brand, estimate monthly units from Amazon's “bought in past month” badges and sales-rank curves, and multiply by list price. Full details are on the methodology page.