How effective is salt restriction in treating hypertension?
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In hypertensive patients, salt restriction decreases systolic blood pressure by 1 to 4 mmHg and diastolic pressure by 0.5 to 4 mmHg when the diet is maintained >6 months. Shorter periods of salt restriction yield slightly greater reductions (5 mmHg for systolic and and 2.5 mmHg for diastolic blood pressures) (SOR: C, systematic reviews of disease-oriented outcomes).
Evidence Based Practice 16(8): 12.