Take an ordinary deli lunch: two slices of bread (about 300 mg of sodium), a few slices of turkey (500–600 mg), a slice of American cheese (roughly 250 mg), a pickle spear (about 300 mg), a squeeze of mustard. That sandwich lands somewhere near 1,500 mg of sodium — well over half the daily cap — and nothing about it tasted salty. No shaker was involved.
The cap in question is 2,300 mg per day, the limit for adults in the US Dietary Guidelines and the number behind the % Daily Value on every nutrition label. It's about one teaspoon of table salt. The average American eats closer to 3,400 mg, and according to the FDA, more than 70% of it comes from packaged and restaurant food — not the salt you add yourself.
That's what makes sodium different from sugar or fat: you cannot taste your way to an accurate count. It hides in foods that read as mild, wholesome, even sweet. Managing sodium is an accounting problem, and accounting problems are solvable.
What the 2,300 mg cap actually means
Sodium is essential. Your nerves fire with it; your fluid balance depends on it. The problem is dose: your body needs a few hundred milligrams a day, and the modern food supply delivers many times that without asking. Consistently high intake pushes blood pressure up in most people over time, which is why every major health body converges on roughly the same line. The US Dietary Guidelines cap adults at 2,300 mg. The World Health Organization recommends staying under 2,000 mg. The American Heart Association calls 1,500 mg an ideal target for many adults. The exact number varies; the direction never does. Nobody credible thinks the average person needs more.
One useful mental anchor: 2,300 mg is a single teaspoon of salt spread across everything you eat and drink in a day — every slice of bread, every sauce, every bowl of soup.
Salt and sodium are not the same number
Table salt is sodium chloride, and sodium makes up only about 40% of it by weight. That gives you two conversions worth memorizing:
- Salt to sodium: multiply by 0.4. A label declaring 1.5 g of salt means 600 mg of sodium.
- Sodium to salt: multiply by 2.5. A frozen dinner with 900 mg of sodium contains the equivalent of 2.25 g of salt.
This matters because labels disagree by region. US labels list sodium in milligrams; European labels list salt in grams. A European ready meal showing "salt: 2.0 g" holds 800 mg of sodium — a third of your day. If you compare products across formats without converting, the salt-labeled one looks 2.5 times worse than it is, or the sodium-labeled one looks 2.5 times better. The % Daily Value column is the shortcut: since the DV is 2,300 mg, the percentage reads directly as a share of your cap, and the FDA's rule of thumb applies — 5% DV or less per serving is low, 20% or more is high. Our guide to reading a nutrition label covers the rest of the panel.
Where hidden sodium actually lives
The foods that push people over the cap are rarely the ones that taste salty. Chips announce themselves. Bread doesn't. The biggest contributors are everyday staples eaten several times a day, every day. Typical values (always check your specific label):
| Food | Typical sodium | Why it adds up |
|---|---|---|
| Bread, 1 slice | 100–230 mg | Four slices across a day is 400–900 mg on its own |
| Bagel | 400–500 mg | One bagel equals three to four slices of bread |
| Deli turkey or ham, 2 oz | 500–700 mg | Brined and cured — salt is the preservative |
| Canned soup, 1 cup | 600–900 mg | And a "cup" is often half the can |
| Cottage cheese, ½ cup | 350–430 mg | Tastes mild; salted heavily in production |
| Jarred pasta sauce, ½ cup | 400–550 mg | Reads as "just tomatoes" |
| Soy sauce, 1 tbsp | 900–1,000 mg | One tablespoon rivals a fast-food burger |
| Cheese pizza, 1 slice | 500–700 mg | Salted dough, salted sauce, salted cheese — and who eats one slice? |
Sodium also arrives through ingredients that aren't salt at all. Sodium nitrite cures your bacon. Sodium phosphate keeps processed cheese smooth. Baking soda leavens your muffin. Monosodium glutamate boosts the broth. Each contributes sodium while doing another job, and several double as markers of heavy processing — the same names covered in our ingredient red flags guide.
The restaurant reality
Restaurants are where sodium budgets go to die. There's no label on the plate, portions run two to four times what you'd serve at home, and salt enters at every stage: the brine, the seasoning, the sauce, the finishing sprinkle. A single chain-restaurant entrée frequently clears 2,300 mg by itself. Add an appetizer, a bread basket, and a soda, and it's possible to double the daily cap in one sitting — before dessert.
The traps are predictable. Soup concentrates salt by design. Anything described as glazed, teriyaki, barbecue, or au jus is carrying a sauce built on it. And "healthy" salads — with dressing, cheese, croutons, and cured protein — routinely rival the burger you virtuously passed on. You don't need to skip eating out; you need a strategy for it, which is exactly what our restaurant ordering guide is for.
How Nutrication uses this
Sodium runs through Nutrication's grading at three levels.
In the grade. Sodium is one of the four penalty nutrients in the app's Nutri-Score framework, which contributes up to 30 points of the overall grade. Penalty thresholds start at 90 mg per 100 g and step up every 90 mg: each threshold a food crosses adds one penalty point, maxing out at 10 points past 900 mg per 100 g. When a label only declares salt, the engine converts it at the standard factor — salt grams × 400 = sodium milligrams, the same 40% relationship as the ×2.5 rule in reverse. Two honesty rules sit on top. If saturated fat, sugars, and sodium are all missing from a product's data, the app refuses to compute Nutri-Score at all rather than hand out falsely favorable low-sodium credit. And a solid food that racks up 11 or more penalty points loses its protein bonus entirely — a rule that, in the engine's own words, "stops processed high-protein junk gaming the score."
In the flags. The 20-point ingredient-flags measure penalizes sodium-bearing additives directly: sodium nitrite or nitrate preservatives cost 6 points, added phosphates cost 2, and MSG costs 1. Even foods lifted to an A by the medical-consensus override keep their sodium caveats — canned sardines and smoked salmon earn top grades for their omega-3s, but the app still warns that canned and smoked versions can run salty.
In the day tracker. The calendar's default daily goals cap sodium at 2,300 mg — an upper bound, not a target. Every item you log adds its sodium to the day's running total (salt-only entries are converted at ÷2.5). Bust the cap and the day's score takes a 5-point penalty, with a note showing exactly how many milligrams over you went. Your individual foods keep their grades untouched: a food's grade describes the food, while the day grade describes the day. The full context swing runs from −10 to +3 — sodium over is −5, sugar over is −5, and hitting your fiber floor earns +3.
What to actually do
- Convert on sight: salt × 0.4 = sodium, sodium × 2.5 = salt. Never compare a salt-labeled product to a sodium-labeled one without doing the math.
- Use the 5/20 rule — 5% DV sodium per serving is low, 20% is high — and check how many servings you'll actually eat.
- Budget one salty element per meal: cured meat, cheese, or a sauce. Not all three.
- Rinse canned beans and vegetables; it washes off a meaningful share of the surface sodium.
- At restaurants, ask for sauces and dressings on the side — they're the densest sodium on the plate.
- Don't fear your own shaker. A pinch added at home is tens of milligrams; the packaged and restaurant stuff is where the thousands live.