Fig. 7. Changes in systolic BP, plasma renin activity, and urinary sodium excretion from the high-salt to low-salt diet in 34 age- and sex-matched normotensive and hypertensive individuals. * P,0.01, P,0.001 low-salt vs high-salt diet; P,0.05 hypertensives vs normotensives in change in systolic BP and plasma renin activity. Reprinted with permission from He et al. [27].