Sodium Tolerance and Hypertension Management in Older Adults

The effects of sodium reduction on blood pressure tend to be greater in middle-aged and older persons, indicating decreased sodium tolerance with advancing age 1
Older adults show a higher risk for hypertension in relation to high sodium excretion, with a stronger blood pressure response to sodium reduction 1

Clinical Implications

Isolated systolic hypertension accounts for >90% of all hypertension cases in adults over 70 years of age, partly due to decreased sodium tolerance 2
Sodium restriction produces greater blood pressure reductions in older adults than in younger individuals 2
The American College of Cardiology/American Heart Association recommends consuming no more than 2,400 mg of sodium/day for patients with hypertension 3, 4
Further reduction to 1,500 mg/day is recommended for greater blood pressure reduction 4, 5
Even reducing sodium intake by 1,000 mg/day can lower blood pressure 4, 5
The blood pressure response to sodium reduction is stronger in older persons, individuals with hypertension, those with diabetes or chronic kidney disease, and African Americans 1, 6

Non-pharmacologic approaches to hypertension management are particularly important in older adults to avoid medication-related adverse effects 2
Dietary sodium restriction should be emphasized in older adults with hypertension, but with careful monitoring to avoid sodium depletion 2