nutrient
Sodium
An extracellular electrolyte involved in fluid distribution, solute transport and electrical gradients across cell membranes.
Educational draft · Human scientific and editorial review pending. About review status
Sodium is naturally present in foods and is commonly added as sodium chloride. The balance between sodium intake, losses and health outcomes is distinct from a recommendation to use salt.
Food sources
Per 100 g| Food | Per 100 g | Daily reference |
|---|---|---|
| Anchovies, canned in olive oil, drained | 5,400 mg | 270% |
| Hummus, commercial | 438 mg | 21.9% |
| Cottage cheese, 2% fat | 321 mg | 16.05% |
| Atlantic sardines, canned in oil (SR Legacy 2018) | 307 mg | 15.35% |
| Almonds, dry-roasted and salted | 256 mg | 12.8% |
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Compared with EFSA’s adult reference of 2 g/day.
About these amounts
These values describe the named food and preparation. A 100 g comparison is not a suggested serving. Small amounts are rounded for display; an unreported amount is not zero.
Healthy European adults, including pregnant and lactating women. Safe and adequate intake: 2 g/day. These are population references, not individual targets.
Portions recorded by the source
- Hummus, commercial: 2 tablespoon (33.9 g) — 148.48 mg, 7.42% of the daily reference.
- Cottage cheese, 2% fat: 1 cup (220 g) — 706.2 mg, 35.31% of the daily reference.
- Almonds, dry-roasted and salted: 1 cup (135 g) — 345.6 mg, 17.28% of the daily reference.
- Light tuna, canned in water, drained: 1 can (142 g) — 310.98 mg, 15.55% of the daily reference.
- Canned diced tomatoes: 1 cup (245 g) — 306.25 mg, 15.31% of the daily reference.
- Braised chicken drumstick: 1 drumstick (104 g) — 121.68 mg, 6.08% of the daily reference.
- Roasted beef tenderloin: 1 roast (462 g) — 249.48 mg, 12.47% of the daily reference.
- Braised chicken breast: 1 piece (174 g) — 81.78 mg, 4.09% of the daily reference.
- Low-fat milk, 1% and fortified: 1 cup (246 g) — 95.94 mg, 4.8% of the daily reference.
- Greek yogurt, plain nonfat: 1 container (156 g) — 56.16 mg, 2.81% of the daily reference.
The source records and EFSA guidance are linked in References below.
How it works
What it does
Sodium is the dominant cation in extracellular fluid. Together with potassium it helps generate transmembrane electrochemical potentials and supports cellular uptake of solutes. The kidneys, hormones and fluid balance regulate sodium across the body.
Where it comes from
Sodium chloride added in processing and discretionary salt are major sources in Western diets.
Related topics
Potassium maintains gradients with Sodium
Potassium and sodium gradients across cell membranes support electrical signalling and solute transport.
Evidence: Established · Source checked 2026-09-05 · Sources: NIH Office of Dietary Supplements: Potassium: Fact Sheet for Health Professionals
Chloride forms table salt with Sodium
Sodium chloride is the main dietary source that couples sodium and chloride in many food records.
Evidence: Established · Source checked 2026-09-05 · Sources: European Food Safety Authority: Dietary reference values for chloride
Worth knowing
Salt and sodium are different amounts. Table salt contains sodium and chloride. A label may report the weight of salt or the weight of sodium, depending on the country; these numbers are not interchangeable.
A closer look
Sodium helps move fluid and electrical signals
Sodium is concentrated mainly outside cells, while potassium is concentrated mainly inside. The body maintains that difference to support fluid balance, nerve signals and muscle function. EFSA’s intake value describes healthy populations rather than an individual treatment target.
References
Source-checked local draft.
Human editorial review pending.
- European Food Safety Authority (opens in new tab)Dietary reference values for sodiumChecked 2026-09-05
- NIH Office of Dietary Supplements (opens in new tab)Potassium: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- European Food Safety Authority (opens in new tab)Dietary reference values for chlorideChecked 2026-09-05
- U.S. Department of Agriculture, Agricultural Research Service (opens in new tab)FoodData Central Foundation Foods, April 2026 JSON releaseChecked 2026-09-05
- U.S. Department of Agriculture, Agricultural Research Service (opens in new tab)FoodData Central SR Legacy, April 2018 JSON releaseChecked 2026-09-05
- European Food Safety Authority (opens in new tab)Scientific Opinion on Dietary Reference Values for magnesiumChecked 2026-09-04
- NIH Office of Dietary Supplements (opens in new tab)Magnesium: Fact Sheet for Health ProfessionalsChecked 2026-09-04
- USDA Agricultural Research Service (opens in new tab)FoodData CentralChecked 2026-09-04
- NIH Office of Dietary Supplements (opens in new tab)Vitamin D: Fact Sheet for Health ProfessionalsChecked 2026-09-05
Take it into the kitchen
Explore this nutrient in simple meals. Recipe pages show estimated amounts and missing data.
Spinach mozzarella bean pan · 20 min →
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Zucchini white bean pot · 22 min →
Compare meals by sodium →