About ProteinBenchmark

Why this exists

"High-protein" is a marketing claim, not a measurement. A cereal labelled "20 g of protein per box" can deliver less than 10% of its calories from protein. A bar that boasts "high-protein" on the front of the wrapper might be 60% sugar and oil by calorie once you read the panel. The problem is not malice — it's that total grams is the wrong number to look at. The right number is protein per calorie: what share of the energy you take in actually contributes to your protein goal.

Every food on this site is scored by that ratio — we call it Protein Density — and assigned to one of four tiers (Platinum 40%+, Gold 25–39%, Silver 15–24%, Avoid < 15%). The model is described in full on the methodology page, including the peer-reviewed sources behind every coefficient.

Why "muscle-centric medicine and GLP-1 era"

Two parallel shifts changed how people need to think about protein:

• Muscle-centric medicine — work from Dr. Gabrielle Lyon and the wider sarcopenia / lean-mass research community has reframed muscle as the largest endocrine organ and the single best predictor of metabolic health into old age. The protein requirements that flow from that framework (1.6–2.2 g/kg, leucine-aware, distributed across meals) are substantially higher than the 0.8 g/kg RDA most people grew up with.
• GLP-1 receptor agonists — semaglutide, tirzepatide and liraglutide (Wegovy, Zepbound, Ozempic, Saxenda) compress weight loss into months and suppress appetite to roughly 1,000–1,500 kcal a day. Without intervention, a meaningful share of that weight loss is lean mass. Hitting a protein floor inside a reduced calorie budget requires the highest-density foods, not the most expensive.

Most of the existing "best protein bar" content on the web was written for a different audience and a different decade. The calculators and database here are built for the person doing this math today: someone with a real protein target, a real calorie ceiling, and a label in their hand they cannot trust.

What we deliberately don't do

A lot of the protein-content ecosystem makes money in ways that quietly bias the recommendations. We try to be specific about the lines we have drawn:

• No fake reviews. The database is sorted by the math, not by sentiment or affiliate margin. A single "owner pick" snack on the site is marked as a first-hand tasting note — never a star rating — and the methodology disclosure on it is explicit.
• No scraped retail prices. $/g-of-protein looks tidy but it falls apart the moment a single SKU goes on sale, a serving size changes, or a scraper grabs the wrong listing. We removed an experimental price pipeline (2026-05-17) for exactly this reason and have not put one back.
• No accounts, no behavioural tracking, no ad pixels. The site is static HTML with anonymised Google Analytics for aggregate page-view counts and nothing else — no third-party ad networks, no remarketing, no logins. See privacy for the specifics.
• No medical advice. This is an educational tool. If you are on a GLP-1 medication, pregnant, breastfeeding, or have any kidney or metabolic condition, the calculators are a starting point — your registered dietitian or doctor is the final word.

How we get the numbers

Every product's protein, calories and serving size traces back to a documented source — usually USDA FoodData Central (SR-Legacy / Foundation Foods) for whole foods, Open Food Facts for packaged products with verified barcodes, and the manufacturer's panel for the narrow set of items USDA does not carry. Restaurant chain figures use the chain's own published nutrition data. Independent restaurants are reconstructed from USDA ingredients with the reconstruction explicitly marked as an estimate. The full list lives on data sources.

Every calculator coefficient — protein per kg targets, the leucine threshold, the GLP-1 lean-mass adjustment, the collagen completeness verdict — is linked to its peer-reviewed source on the methodology page. If a number on this site is wrong, we want to know: contact us with a label or a paper and we will update it.

Get started

• The protein-intake calculator — your target in grams, with goal and age adjustments.
• The GLP-1 calculator — protein floor + required snack tier for a reduced-calorie day.
• Why leucine matters — the threshold most "high-protein" labels miss.
• Whole foods database — the foundation foods ranked by protein per calorie.