Effects of phenylalanine supplementation on body weight (A), heart rate (B), systolic pressure (C), serum nitrite (D), and urinary albumin (E) in Dahl SS rats fed a low salt or high salt diet. Each value represents the mean ± SEM, n = 6–8, * p<0.05 vs. LS group, # p<0.05 vs. HS group.