Table 2.

Electrolytes and renal function pre- and post-dietary intervention

Parameter	Pre	Post	p
Serum sodium (mmol/L)*	141 ± 3	139 ± 3	.07
Serum potassium (mmol/L)*	4.5 ± 0.4	4.6 ± 0.6	.46
Serum creatinine (mg/dL)*	1.0 ± 0.2	1.2 ± 0.3	.02
Blood urea nitrogen (mg/dL)*	28 ± 13	41 ± 24	.03
24-hour creatinine clearance (ml/min/1.73 m2)	66 ± 35	57 ± 30	.11
Serum cystatin C (mg/dL)	1.34	1.41	.65
24-hour urinary sodium (mg/24 hr)	3353 ± 1593	1478 ± 933	<.001
24-hour urinary potassium (mg/24 hr)	2284 ± 793	2925 ± 1024	.04

^*One subject was withdrawn at safety visit for elevated serum potassium (see text); safety visit values for these parameters are included in ‘Post’ column