ProteinPrice.com is an independent US protein price comparison engine. We track 377 products across 64 brands at 12 US retailers, refresh prices daily, and rank everything by a transparent Value Score calculated as grams of protein per dollar. Journalists, researchers, podcast hosts, and editors are welcome to use any of our public data, quote our methodology, or contact us for original commentary on the protein supplement market.
The elevator pitch
Most "best protein" content online is brand-influenced. Either the publisher takes paid placement, or rankings are picked editorially in a way that suspiciously favours the same six SKUs. The math nobody runs is the one that matters: grams of protein per dollar.
ProteinPrice computes that number, every day, in public, for every product we track. Live scraped prices, normalized serving sizes, transparent Value Score formula, and an append-only price history audit trail. If a product moves to the #1 spot, you can see why. If a brand we like drops in rank, we say so.
No paid placement. Ever. We earn affiliate commissions when readers click through and buy, but commissions have zero effect on rankings. Every order is generated automatically from the formula. See /affiliate-disclosure/.
What we cover
ProteinPrice ranks supplements in the protein category sold to US consumers. Our scope is intentionally narrow so we can be thorough inside it. We do not track creatine, pre-workout, multivitamins, fat burners, or any category outside protein.
- Whey protein: concentrates, isolates, hydrolysates, and blends. See /whey-protein/.
- Casein protein: micellar and hydrolyzed. See /casein-protein/.
- Plant protein: pea, rice, soy, hemp, and blends. See /plant-protein/.
- Clear whey: hydrolysate-based fruit-flavoured powders. See /clear-whey/.
- Collagen: hydrolyzed peptides and beauty blends. See /collagen/.
- Mass gainers: high-calorie carb and protein blends.
- Protein bars + drinks: ready-to-eat and ready-to-drink protein with sub-category cuts (high-protein, low-sugar, plant-based, meal replacement, premium RTD, clear protein water, protein coffee).
By the numbers
- 377 SKUs in the live catalog, with new products added weekly as we verify them.
- 64 brands covered, from mass-market (Optimum Nutrition, Dymatize, MuscleTech, Quest, MyProtein) to specialist (Transparent Labs, Bare Performance Nutrition, Naked Nutrition, KOS, Vital Proteins).
- 12 US retailers scraped: Amazon, Walmart, Costco, Target, iHerb, GNC, Bodybuilding.com, Vitacost, Muscle & Strength, Tiger Fitness, MyProtein US, and Transparent Labs direct.
- Daily price refresh cadence, with per-retailer last-success timestamps surfaced on every product page and on our public scraper status page.
- 10 top-level categories plus 10 named sub-categories inside protein bars and drinks.
- Append-only price history: every accepted price change is logged to
price_history-YYYY-MM.jsonlin /data/ and never rewritten. - Open JSON data feeds: products, brands, retailers, scope, scraper status, price history, and price lows are published at /data/ with documentation at /api/docs/.
Press quotes available on these topics
We are happy to provide on-the-record commentary, original data cuts, or background briefings on protein-market topics. Recent and ongoing areas we can speak to:
Cheapest whey protein in 2026
Which brands and SKUs currently win on grams of protein per dollar, and how prices have moved this year.
Value Score methodology
Why protein per dollar beats sticker price, with worked examples and data on how rankings shift week to week.
Retailer price gaps
How much the same SKU varies between Amazon, Costco, iHerb, and brand-direct sites, and what drives the spread.
Plant vs whey pricing
Per-gram cost differences between plant-based and whey protein, and how the gap has changed over time.
RTD protein economics
Why ready-to-drink protein costs four to six times more per gram than powder, and which RTDs come closest to powder economics.
Stale-price safeguards
How our 48-hour stale flag, 50% swing rejection, and outlier filters keep bad scrapes off the page.
Quoting our data
You are welcome to quote ProteinPrice rankings, prices, and Value Scores in your reporting. We ask two things:
- Attribute the source as ProteinPrice.com and, where possible, link to the underlying page (a category page, a product page, or the relevant guide).
- Note that prices update daily. A figure you quote today may have moved by the time the story runs. For time-sensitive pieces, drop us a note and we will confirm the freshness window.
For larger data pulls, custom cuts, or aggregate trend numbers across months of price history, contact us and we will work with you.
About the publisher
ProteinPrice.com is an independent project. We are not owned by, employed by, or financially backed by any supplement brand. We earn affiliate commissions through standard retailer programs (Amazon Associates, iHerb, Bodybuilding.com, MyProtein, Transparent Labs, Muscle & Strength, GNC, Vitacost). Commission rates do not affect rankings, and we publish a full Affiliate Disclosure, Editorial Standards, and How We Test for full transparency.
Contact
Press: [email protected]
General: [email protected]
Twitter / X: @proteinprice
Web contact form: /contact/
Please mention your outlet, deadline, and topic in your first email so we can reply quickly with the most useful angle.