Article

Optimal Dietary Strategies for Reducing Incident Hypertension

Johns Hopkins Bloomberg School of Public Health, Welch Center for Prevention, Epidemiology, and Clinical Research, and Center for Human Nutrition, Baltimore, Md.
Hypertension (Impact Factor: 7.63). 09/2009; 54(4):698-9. DOI: 10.1161/HYPERTENSIONAHA.109.136630
Source: PubMed
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    ABSTRACT: Background To investigated the influence of dietary potassium on the sodium effect on BP in the general population and the adherence of current recommendations for sodium and potassium intake. Methods An overnight (12 h) urine sample was collected in a population-based study to investigate cardiovascular risk. A sub-sample of 1,285 subjects (25-64 years) free from any medication interfering with BP or potassium excretion was studied. Results 86.0% of participants consumed over 6 g of salt/day and 87.7% less than the recommended intake of potassium (4.7 g). Potassium excretion and the sodium to potassium ratio were significantly related to systolic and diastolic BP only in subjects consuming more than 6 g/day of salt. Subjects in the highest sodium to potassium ratio quartile (surrogate of unhealthy diet) presented 8 mmHg and 7 mmHg higher values of systolic and diastolic BP, respectively, when compared with the first quartile whilst individuals in the fourth quartile of urinary potassium excretion (healthier diet) showed 6 mmHg and 4 mmHg lower systolic and diastolic BP, respectively, compared with the first quartile. Conclusion Our data indicate that when people have an increased intake of potassium, high intake of sodium is not associated with higher BP.
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