Best-selling l-carnitine (sports) brands on Amazon

By estimated revenue, Cutler is the best-selling l-carnitine (sports) brand on Amazon right now, at roughly $1.8M/mo from 1 product in the L-Carnitine (Sports) Best Sellers top 100 (best position #1). By estimated units, NOW Foods sells the most, about 69.4K 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 L-Carnitine (Sports) Best Sellers list was Cutler Nutrition Liquid L-Carnitine Fat Burner with Acetyl L-Carnitine | Sour Gummy Worm, 16 fl oz… from Cutler, with an estimated 67.3K units and ~$1.8M in revenue per month. Ranks change hourly, so check Amazon for the live list.

57 distinct brands have at least one product in the L-Carnitine (Sports) top 100. The 10 biggest by estimated revenue account for about 58% of the list's estimated sales, and the top 3 for about 27%.

We estimate the top 100 l-carnitine (sports) products together bring in about $19.3M 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.