Best-selling calcium brands on Amazon

By estimated revenue, AlgaeCal is the best-selling calcium brand on Amazon right now, at roughly $759K/mo from 4 products in the Calcium Best Sellers top 100 (best position #15). By estimated units, Nature's Bounty sells the most, about 39.7K 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 Calcium Best Sellers list was Nature's Bounty Calcium 1200mg with 1000 IU Vitamin D3, 120 Count | Bone Health & Immune Support… from Nature's Bounty, with an estimated 27.1K units and ~$240K in revenue per month. Ranks change hourly, so check Amazon for the live list.

54 distinct brands have at least one product in the Calcium top 100. The 10 biggest by estimated revenue account for about 62% of the list's estimated sales, and the top 3 for about 29%.

We estimate the top 100 calcium products together bring in about $7.2M 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.