Thursday, 27 December 2012

Salt substitution reduces hypertension in Chinese people

Blood pressure was lowered by 4mm after replacing some sodium chloride with potassium chloride
by Michael Woodhead
Replacing regular salt with a potassium chloride-based  alternative may be an effective additional way to lower blood pressure for Chinese hypertensive patients, a study has shown.
Professor Zhou Beufan and colleagues from Beijing assessed the potential efficacy of replacing sodium chloride with potassium chloride for preventing hypertension in patients with hypertension and also in normotensive family member controls.
They conducted a double-blind, randomized controlled trial among 200 families in rural China to establish the two-year effects of a reduced-sodium, high-potassium salt substitute (65% sodium chloride, 25% potassium chloride, 10% magnesium sulfate) compared with normal salt (100% sodium chloride) on blood pressure.
Of the 372 people who completed the study, the mean overall difference in blood pressure between the two groups at the 24-month follow-up was 2 mm Hg for systolic BP and  and 2 mm Hg for diastolic BP. For the people with hypertension, there was a 4mm Hg overall decrease in systolic blood pressure, but diastolic blood pressure was not affected by salt use in the hypertensive group.
The researchers conclude that salt substitution lowers systolic blood pressure in hypertensive patients and lowers both systolic and diastolic blood pressure in normotensive controls.
"Salt substitution, therefore, may be an effective adjuvant therapy for hypertensive patients and [has] potential efficacy in preventing hypertension in normotensive individuals," they say.
Source: Journal of Human Hypertension

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