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A low sodium diet has a useful effect to reduce blood pressure, both in people with [[hypertension]] and in people with normal blood pressure.<ref name=Coc2013>{{cite journal|last1=He|first1=FJ|last2=Li|first2=J|last3=Macgregor|first3=GA|title=Effect of longer-term modest salt reduction on blood pressure.|journal=The Cochrane Database of Systematic Reviews|date=30 April 2013|issue=4|pages=CD004937|doi=10.1002/14651858.CD004937.pub2|pmid=23633321}}</ref> Taken together, a low salt diet (median of approximately 4.4 g/day - approx 1800 mg Sodium) in hypertensive people resulted in a decrease in [[systolic blood pressure]] by 4.2 mmHg, and in [[diastolic blood pressure]] by 2.1 mmHg.<ref name=Coc2013/>
Advising people to eat a low salt diet, however, is of unclear effect in either hypertensive or normal tensive people.<ref>{{cite journal|last1=Adler|first1=AJ|last2=Taylor|first2=F|last3=Martin|first3=N|last4=Gottlieb|first4=S|last5=Taylor|first5=RS|last6=Ebrahim|first6=S|title=Reduced dietary salt for the prevention of cardiovascular disease.|journal=The Cochrane Database of Systematic Reviews|date=18 December 2014|issue=12|pages=CD009217|doi=10.1002/14651858.CD009217.pub3|pmid=25519688}}</ref> In 2012, the British Journal ''Heart'' published an article claiming that a low salt diet appears to increase the risk of death in those with [[congestive heart failure]],<ref>{{cite journal|last=Dinicolantonio|first=JJ|author2=Pasquale, PD |author3=Taylor, RS |author4= Hackam, DG |title=Low sodium versus normal sodium diets in systolic heart failure: systematic review and meta-analysis.|journal=Heart|date=Jan 24, 2013|pmid=22914535|doi=10.1136/heartjnl-2012-302337}} {{Retracted |doi=10.1136/heartjnl-2012-302337ret}}</ref> but the article was retracted in 2013.<ref>{{cite journal|last=no author given|title=Retraction. Low sodium versus normal sodium diets in systolic heart failure: systematic review and meta-analysis.|journal=Heart|date=June 2013|volume=99|issue=11|doi=10.1136/heartjnl-2011-301156.29ret|pmid=23640983|url=http://heart.bmj.com/content/early/2013/03/12/heartjnl-2012-302337.extract?sid=63487461-4bd2-483d-b411-a432e0a82695|accessdate=2013-09-29|pages=820}}</ref> The article was retracted by the journal when it was found the two of the studies cited contained duplicate data that could not be verified.<ref>{{cite web|last=amarcus41|title=Heart pulls sodium meta-analysis over duplicated, and now missing, data|url=http://heart.bmj.com/content/early/2013/03/12/heartjnl-2012-302337.extract?sid=63487461-4bd2-483d-b411-a432e0a82695|publisher=Retraction Watch|accessdate=2013-09-29}}</ref>
== Food and drink contents ==
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