When you eat almost no salt, your body may overwork a system that controls blood pressure, making your blood vessels tighter and raising your risk of heart problems.
Evidence from Studies
Supporting (0)
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Contradicting (2)
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Dietary salt intake and cardiovascular outcomes: an umbrella review of meta-analyses and dose-response evidence
The study found that eating less salt lowers blood pressure and reduces heart disease risk, which is the opposite of what the claim says — the claim thinks very low salt makes your blood vessels tighter and harms your heart, but the data shows the opposite.
Effect of low sodium and high potassium diet on lowering blood pressure and cardiovascular events
The study says eating less salt and more potassium is good for your heart and lowers blood pressure, but it doesn’t say anything about whether low salt makes your body overwork a specific system (RAAS) that could hurt your blood vessels.
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.