Best-selling fish oil (omega-3) brands on Amazon

By estimated revenue, Sports Research is the best-selling fish oil (omega-3) brand on Amazon right now, at roughly $1.9M/mo from 3 products in the Fish Oil (Omega-3) Best Sellers top 100 (best position #1). By estimated units, Nature's Bounty sells the most, about 91.1K 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 Fish Oil (Omega-3) Best Sellers list was Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska Pollock, 90 Count | Always Fresh Never… from Sports Research, with an estimated 54.1K units and ~$1.7M in revenue per month. Ranks change hourly, so check Amazon for the live list.

56 distinct brands have at least one product in the Fish Oil (Omega-3) top 100. The 10 biggest by estimated revenue account for about 62% of the list's estimated sales, and the top 3 for about 28%.

We estimate the top 100 fish oil (omega-3) products together bring in about $18.5M 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.