Salt Reduction for Hypertension Control

Evidence for Blood Pressure Reduction

The American Heart Association and European Society of Hypertension recommend reducing sodium intake to lower both systolic and diastolic blood pressure, prevent hypertension development, and decrease cardiovascular morbidity and mortality 1, 2, 3
Meta-analyses of randomized trials demonstrate that reducing sodium intake by approximately 80 mmol (1.8 g) per day lowers systolic blood pressure by approximately 4 mmHg and diastolic blood pressure by 2 mmHg in hypertensive patients, with smaller but meaningful reductions in normotensive individuals 1, 2
The Trials of Hypertension Prevention documented that sodium reduction, either alone or combined with weight loss, can prevent hypertension by approximately 20% in at-risk individuals 1, 2
The Trials of Nonpharmacologic Interventions in the Elderly (TONE) showed that reduced salt intake effectively lowered blood pressure and reduced the need for antihypertensive medication in older persons, with dietary interventions reducing total sodium intake to 100 mmol/day 1, 2

The World Health Organization (WHO) and American Heart Association recommend limiting salt intake to less than 5-6 g per day (equivalent to approximately 2000-2400 mg sodium per day) 1, 2, 3, 4
More aggressive targets of 1500 mg sodium per day are recommended by some guidelines specifically for high-risk populations including blacks, middle-aged and older adults, and individuals with hypertension, diabetes, or chronic kidney disease 3, 5

Blacks and other racial minorities show particularly strong blood pressure responses to dietary salt modification and should be prioritized for salt reduction interventions 1, 2
The American College of Cardiology recommends that patients with hypertension reduce their sodium intake to less than 5-6 g per day 1, 2, 3

In hypertensive patients with controlled blood pressure on medications, salt restriction can facilitate medication step-down or even withdrawal in certain individuals 1, 6

The American Heart Association recommends that consumers choose foods low in salt and limit the amount of salt added to food 1, 2
Any meaningful strategy to reduce salt intake must rely on food manufacturers reducing the amount added during food processing 1, 2

Increase potassium intake to approximately 3000-4700 mg per day through fruits, vegetables, and low-fat dairy products 3, 5, 7
The American Heart Association recommends following the DASH (Dietary Approaches to Stop Hypertension) diet pattern, which emphasizes vegetables, fruits, and low-fat dairy products while being reduced in saturated fat 1, 6
Maintain healthy body weight, as weight reduction produces blood pressure reductions of approximately 1.6/1.1 mmHg per kilogram of weight loss 6, 8
Limit alcohol intake to no more than 2 drinks per day for men and 1 drink per day for women 6, 8

Patients with advanced chronic kidney disease should avoid excessive potassium supplementation and potassium-enriched salt substitutes 7, 9
Individual blood pressure response to salt reduction varies due to genetic factors and host characteristics such as age 1, 2