As of October 2026 · 111 listings tracked across Amazon, Walmart & eBay
Right now the best value is 42¢ per oz — Dymatize Super Mass Gainer Protein Powder, 52g Protein, Gourmet Vanil… (96.0 oz, $39.98) on Walmart. See it on Walmart →
Prices change fast and stock disappears faster — YMMV.
The pack-size trapThe biggest pack we tracked (192.0 oz) looks like the bulk play, but it runs 54¢ per oz — the 96.0 oz pick wins at 42¢ per oz. Bigger isn't automatically cheaper.
Median across all 111 tracked listings: $1.23 per oz. The worst deal we saw ran $3.19 per oz — same product category, 7.7× the price per unit.
The 12-month picture
Jul 2026low 36¢ per oz · high 59¢ per ozOct 2026
Basically flat since last month.
Lowest we've ever tracked: 36¢ per oz (August 2026).
How we figure this out
Once a month we pull live Protein Powder listings from Amazon, Walmart and eBay, read the honest quantity out of each one (ozs, in this case — the unit that actually matters), and divide the real price by it. Coupons that change what you'd pay today are applied; "subscribe & save" teasers are not. Then everything gets ranked by cost per oz, because a big box with a small number inside is still a small number.
Our Amazon links are plain links — no affiliate tag, no commission.
Amazon doesn't allow affiliate sites to run price alerts, so we chose the alerts. If eBay or Walmart links ever earn us a commission, they'll be labeled (paid link) — and it never changes the price you pay.
Prices checked October 1, 2026. Prices change fast — treat this page as a map, not gospel, and YMMV. For today's numbers, run a live search.