Best-selling dietary fiber brands on Amazon

By our estimates, Metamucil is the best-selling dietary fiber brand on Amazon right now: it has 11 products in the Dietary Fiber Best Sellers top 100 (best position #1) and roughly $2.6M/mo in estimated revenue there. 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 Dietary Fiber Best Sellers list was Metamucil 4-in-1 Psyllium Husk GLP-1 Friendly Fiber Supplement, Sugar-Free, 72 teaspoons, Orange… from Metamucil, with an estimated 43.3K units and ~$778K in revenue per month. Ranks change hourly, so check Amazon for the live list.

65 distinct brands have at least one product in the Dietary Fiber top 100. The 10 biggest by estimated revenue account for about 54% of the list's estimated sales, and the top 3 for about 33%.

We estimate the top 100 dietary fiber products together bring in about $14.1M 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.