Salt makes your body hold more water, which increases blood volume and raises pressure in your blood vessels.

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Evidence from Studies

Supporting (2)

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Effect of Dietary Sodium on Blood Pressure: A Crossover Trial.

Randomized Controlled Trial

Human

2023 Dec 19

When people ate less salt, their blood pressure went down, and when they ate more salt, it went up — which means salt makes the body hold onto more water, increasing blood volume and pressure.

(Pro)renin Receptor Blockade Prevents Increases in Systolic Blood Pressure, Sodium Retention, and αENaC Protein Expression in the Kidney of 2K1C Goldblatt Mice

Randomized Controlled Trial

Animal

2025 Apr 28

This study found that blocking a specific receptor can prevent high blood pressure and fluid retention caused by sodium, supporting the idea that sodium intake affects blood pressure through fluid retention.

Contradicting (0)

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No contradicting evidence found

Similar Assertions

Even though people urinate out more salt after drinking this mineral water, their blood pressure doesn’t go up — meaning the body’s salt removal system works fine without raising BP.

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Eating a lot of carbs might make your body hold onto more salt, which could raise your blood pressure.

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Kidneys regulate blood volume by controlling sodium and water excretion.

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People who excrete more sodium in their urine tend to have more fluid outside their cells.

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