Analysis Version
v1
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correlational
Analysis v1
Strong Support

Eating too little or too much salt might both be bad for your heart — people who eat way less than 3,000 mg or way more than 6,000 mg of salt a day seem to have a higher chance of heart problems or dying from them.

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Pro
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Against

Evidence from Studies

Supporting (2)

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Community contributions welcome

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Urinary sodium and potassium excretion, mortality, and cardiovascular events.

Cohort Study
Human
2014 Aug 14

This study found that people who eat too little salt (<3 grams a day) or too much salt (>6 grams a day) are more likely to have heart problems or die, but those who eat a moderate amount (3–6 grams) are healthiest — just like a J-shaped curve.

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The relation between urinary sodium and potassium excretion and risk of cardiovascular events and mortality in patients with cardiovascular disease

Cohort Study
Human
2022

This study found that people with heart disease who ate too little or too much salt had a higher risk of heart problems or dying, with the safest amount being in the middle — which matches the claim that both very low and very high salt intake are dangerous.

Contradicting (1)

0

Community contributions welcome

36

Impact of sodium intake on blood pressure, mortality and major cardiovascular events: an umbrella review of systematic reviews and meta-analyses

Systematic Review With Meta-Analysis
Human
2025

This study says eating less salt is good for your heart, but it doesn’t say anything about eating too much salt being bad — so it can’t prove that both too little and too much salt are dangerous.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Similar Assertions

People who eat very little salt—less than 3 grams a day—are more likely to die or have serious heart problems, even when you account for their blood pressure and other health factors.

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0
92%

Eating a lot of salt—more than 7 grams a day—might make people with high blood pressure more likely to have a heart attack, stroke, or even die sooner.

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91%

People who eat about 3 to 6 grams of salt per day seem to have fewer heart problems and live longer than those who eat much less or much more salt — it’s like there’s a sweet spot for salt intake.

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90%

Eating less salt may help people live longer and avoid heart-related deaths, according to studies that combined results from many other studies.

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89%

For people with slightly high blood pressure, eating more salt seems to raise the risk of dying earlier—even at very low salt levels below what’s usually considered healthy. There’s no sign that eating very little salt is safe or helpful.

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89%

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