Salt Questions · Health & nutrition
How long does it take for sodium levels to drop after a salty meal?
Short answer
Your blood sodium concentration barely changes after a salty meal, because thirst and the kidneys keep it in a narrow range. What changes is how much water you hold. Most of the extra sodium and the water that came with it is excreted over about one to two days, with the puffiness fading as it goes.
After a salty meal
- 1Hours 0–3: thirst, you drink more
- 2Hours 3–24: kidneys hold water, you feel puffy
- 3Days 1–2: extra sodium and water excreted
- 4Back to normal weight
Blood sodium stays steady
In healthy people, blood sodium stays close to 135–145 mEq/L. After a salty meal, you drink more and your kidneys save water, so the extra sodium is diluted rather than building up.
The extra sodium leaves gradually
The kidneys increase sodium excretion over the following hours and days. Most people see bloating and water weight resolve within a day or two of returning to their usual diet.
Helping it along
- Drink water to thirst.
- Eat potassium-rich foods: fruit, vegetables, beans, yogurt.
- Keep the next meals lower in salt.
- Stay active.
Swelling that doesn't go away, or appears without a salty meal, should be checked by a doctor.
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Cite this page
For school projects and reports. Teachers often prefer the original sources too: see the list below.
The Salt Almanac. (2026, November 8). How long does it take for sodium levels to drop after a salty meal. https://saltalmanac.com/answers/how-long-does-it-take-for-sodium-levels-to-drop-after-a-salty-meal
“How long does it take for sodium levels to drop after a salty meal.” The Salt Almanac, 8 Nov. 2026, saltalmanac.com/answers/how-long-does-it-take-for-sodium-levels-to-drop-after-a-salty-meal. Accessed [today's date].
“How long does it take for sodium levels to drop after a salty meal.” The Salt Almanac. Last modified November 8, 2026. https://saltalmanac.com/answers/how-long-does-it-take-for-sodium-levels-to-drop-after-a-salty-meal.
Original sources
- Mayo Clinic. Sodium: how to tame your salt habit. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/sodium/art-20045479
- Mayo Clinic. Hyponatremia: symptoms and causes. https://www.mayoclinic.org/diseases-conditions/hyponatremia/symptoms-causes/syc-20373711