Does a Low-Sodium Diet Reduce Blood Pressure?
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Reducing sodium intake does lead to a slightly lower average blood pressure. However, no evidence from controlled trials proves that reducing sodium intake decreases morbidity or mortality, or proves that modest sodium restriction is harmful. [Strength of recommendation: A, based on meta-analyses of randomized controlled trials (RCTs) with disease-oriented outcomes.]
American Family Physician 69(2) 2004.