Canned Sardines Out-Grade Your Cheese, Your Yogurt, and Your "Protein" Snacks

Here is the one-line verdict: a $2 tin of sardines out-grades every cheese we tested — and most of the "protein" snacks in the aisle. On our absolute, label-driven scale, the best canned fish lands at B+ (83/100), while the best cheese we could find caps out at B- (71/100). It's probably the best-value health food almost nobody buys.

The receipts: canned fish vs the best cheese, side by side

Both lists below are pulled live from the Labelgrade database, sorted by score. On the left, the top eight tins of sardines, salmon, and tuna — every single one a B+. On the right, the five best cheeses we've graded out of 13 total. The worst tin on the left still beats the best cheese on the right.

Want the full ranked lists? Here's the canned fish report card and the cheese report card — every product, every grade, and the weakest dimension that dragged each one down.

Why sardines score so high

Strip away the marketing and a tin of sardines is close to a perfect nutrition label. Four things drive the grade:

• Dense, complete protein. Roughly 18–21 g per 3 oz tin, with all nine essential amino acids — the same complete-protein quality as chicken, eggs, or whey, in a shelf-stable can that costs around two dollars.
• Omega-3 fats, not saturated fat. Sardines are one of the richest sources of EPA and DHA — the marine omega-3s tied to heart and brain health — anywhere in the store. The fat in a tin is mostly the kind nutrition guidelines tell you to eat more of.
• Calcium from the edible bones. This is the trick most people miss. The bones are pressure-cooked soft and you eat them, which is why a single tin can supply 30–35% of your daily calcium — the exact mineral most people reach for cheese to get.
• Almost no carbs or sugar. Water- and oil-packed tins are effectively zero-carb and zero-sugar, so they never lose points on the dimensions that sink so many "protein" snacks.

Add it up and you have very high protein density, a clean two-ingredient label (fish, water), zero added sugar, and good fat — four of our six dimensions running near the top. The only knock is sodium, and even that is a buying choice, not a property of the fish (more on that below). That's how the best tins reach B+ (83/100).

Why cheese can't catch them

This is the part worth saying plainly: cheese isn't bad food. It's real, minimally processed, protein-bearing food, and on a curve graded only against other cheeses, a block of aged cheddar would do fine. But Labelgrade is an absolute scale — every product is measured against all packaged foods — and cheese runs into two walls it physically can't climb over:

• Saturated fat. Cheese is concentrated milk fat, and that fat is heavily saturated. A serving routinely carries 4–6 g of saturated fat, which caps the saturated-fat dimension no matter how clean the rest of the label is.
• Sodium. Salt is intrinsic to making and preserving cheese — it's not an additive you can simply leave out. Most cheeses run 150–400 mg of sodium per small serving, capping a second dimension.

Two of six dimensions effectively maxed out before you even look at protein is why the entire category lands in the same band. In our database the best cheeses are Kraft Singles American Cheese Slices (Twin Pack) and a Kraft Single, tied at B- (70/100), and it slides into C+ from there. None of the 13 we graded beat a B-. Sardines, with omega-3 fat instead of saturated and a sodium problem you can buy your way out of, clear that ceiling easily.

The honest caveats (and the practical takeaway)

Two things to keep honest, handled separately because they're genuinely different:

• Sodium — real, but solvable. A standard salted tin can run 250–400 mg of sodium per serving. If sardines become a daily habit, that adds up. The fix is one shelf over: buy a no-salt-added or water-packed tin — that's exactly why the no-salt version sits at the top of the table above, at 83/100.
• Mercury — genuinely low here. Mercury is the standard worry with fish, but sardines are the reassuring exception. They're small, short-lived, and low on the food chain, so they accumulate very little — among the lowest-mercury seafood there is, low enough to be recommended even in pregnancy. Watch the sodium; don't lose sleep over the mercury.

The takeaway is almost unfairly simple. For about two dollars, a tin of sardines is the cheapest single nutrition upgrade in the store: complete protein, omega-3s, vitamin D and B12, and calcium, in a can that sits in your pantry for years. Oil-packed or water-packed both grade well — water-packed and no-salt score highest. Eat them bones-and-all on crackers, mashed onto toast, or straight from the tin. The humblest thing in the aisle quietly out-grades the fanciest cheese in the case.

Curious how the scoring works, or how the categories compare? Read the Labelgrade methodology, then the full canned fish and cheese report cards. Named tins worth starting with: Wild Planet No Salt Added Sardines and Wild Planet Wild Pink Salmon.