Table 1.

Effects of dietary salt on plasma and urine electrolytes

	0.4% NaCl (3 wk)	4% NaCl (3 wk)	4% NaCl (overnight)
No. of rats	7	8	8
Final body weight, g	353±8	364±2	293±20*
Plasma [Na+], mM	142.0±5.7	141.1±0.1	145.0±4.2
Plasma [K+], mM	3.9±0.2	4.1±0.2	4.0±0.2
Urine Na+ excretion, mmol·h−1·kg−1	0.04±0.02	0.45±0.23*	0.4±0.15*
Urine output, ml/h	0.2±0.1	0.73±0.37*	0.61±0.27*

Values are means ± SD. [Na⁺], [K⁺], Na⁺, K⁺ concentration.

^*P < 0.05 vs. 0.4% NaCl (3 wk) group.