A: diagram of diet-switch protocol performed in Dahl salt-sensitive (S) rats. Rats were fed Teklad diet or American Institutes of Nutrition (AIN) diet at weaning (3 wk old). Rats either remained on respective diet until 16 wk old, or, at 12 wk old, diets were switched, with Teklad-fed rats changed to AIN diet (Teklad→AIN), or AIN-fed rats changed to Teklad diet (AIN→Teklad). B: weekly body weights for Dahl S rats for Teklad (N = 9), AIN (N = 9), Teklad→AIN (N = 10), and AIN→Teklad (N = 9). Data were analyzed by two-way ANOVA.