(A) The different serum selenium (Se) levels between SD rats fed a selenium-deficient diet and those fed a selenium-normal diet for 16 weeks (*P < 0.05 vs Se-normal, n=5/group). (B-D) Systolic-(SBP, B), diastolic-(DBP, C) and mean blood pressures (MBP, D) in SD rats fed the selenium-deficient diet for indicated time (*P < 0.05 vs Se-normal, n=5/group). (E, F) 24-hours urine volume (E) and sodium excretion (UNa, F) in SD rats fed the selenium-deficient diet for indicated time (*P < 0.05 vs Se-normal, n=5/group).