Best-selling Vitamin C brands on Amazon

By estimated revenue, Emergen-C is the best-selling Vitamin C brand on Amazon right now, at roughly $1.3M/mo from 16 products in the Vitamin C Best Sellers top 100 (best position #1). 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 Vitamin C Best Sellers list was Emergen-C Vitamin C 1000mg Immune Support Powder, Orange, 30 Packets | B Vitamins for Energy, Zinc… from Emergen-C, with an estimated 37.9K units and ~$492K in revenue per month. Ranks change hourly, so check Amazon for the live list.

44 distinct brands have at least one product in the Vitamin C top 100. The 10 biggest by estimated revenue account for about 70% of the list's estimated sales, and the top 3 for about 48%.

We estimate the top 100 Vitamin C products together bring in about $5.9M 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.