Figure 1.

Average changes in mean arterial pressure (MAP) in black (B) and white (W) normotensive groups induced by switching from low NaCl intake to high NaCl intake. Subjects were normotensive or results were adjusted for baseline systolic blood pressures in study (Ref. 34) that included both normotensive and hypertensive subjects and where order of administration of the low- and high-salt diets was randomized. *Significant difference between B and W groups. #B group given K⁺ intake of 120 mmol/day and W group 70 mmol/day. Target NaCl intake in the low-salt phase was less than or equal to 50 mmol/day in all studies. DHHS, Department of Health and Human Services; USDA, US Department of Agriculture.