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Systematic review and meta-analysis
Modest salt intake reduction for 4 weeks or longer decreases blood pressure
  1. Veronica Franco
  1. The Ohio State University, Columbus, Ohio, USA
  1. Correspondence to : Dr Veronica Franco, The Ohio State University, Davis Heart and Lung Research Institute, suite 200, 4 W 12th Avenue, Columbus, OH 43210, USA; veronica.franco{at}

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Implications for practice and research

  • Salt restriction (<6 g/day) improves blood pressure (BP).

  • The effect in hypertensives is more significant than normotensives.

  • Small increase in renin-angiotensin-aldosterone (RAAS) markers.

  • Long-term data regarding the effects of sodium restriction is limited.


Hypertension is a primary cause of death and disability.1 Despite great strides in achieving BP targets, the majority of patients remain undertreated. Current recommendations include the dietary approaches to stop hypertension (DASH) diet and sodium reduction (6 g/day salt).1

DASH-sodium is the sequel to the DASH study, as salt was not a factor originally.2 Reductions in the BP by decreasing salt, while not as impressive as with DASH, were still substantial. A reduction of 4 g/day of salt for …

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  • Competing interests None.