Why the study?
The optimal level of salt restriction to improve cardiovascular outcomes remains debated, with emerging evidence showing potential deleterious effects of aggressive restriction even in heart failure.
Does dietary salt restriction improve cardiovascular outcomes across all patient populations?
Does dietary salt restriction improve cardiovascular outcomes across all patient populations?
This review challenges the universal application of strict low-sodium diets, highlighting potential harms of aggressive salt restriction in specific groups like heart failure patients.
May support targeted salt restriction in salt-sensitive hypertension; leaves open prospective RCTs on mechanisms and outcomes.
Dietary salt intake is a long-debated issue. Increased sodium intake is associated with high blood pressure, leading to salt-sensitive hypertension. Excessive salt intake leads to arterial stiffness in susceptible individuals via impaired nitric oxide action and increased endothelin-1 expression, overactivity of the renal sympathetic nervous system and also via aldosterone-independent activation of the mineralocorticoid receptor. Salt restriction in such individuals reduces blood pressure (BP) values. The optimal level of salt restriction that leads to improved cardiovascular outcomes is still under debate. Current BP and dietary guidelines recommend low sodium intake for the general population. However, a specific category of patients does not develop arterial hypertension in response to sodium loading. In addition, recent research demonstrates the deleterious effects of aggressive sodium restriction, even in heart failure patients. This mini review discusses current literature data regarding the advantages and disadvantages of salt restriction and how it impacts the overall health status.
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Hogaș et al. (2022) studied this question.
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