 The normal range of pH of the blood measure of acid-base balance of body is rather large. It is defined as a range of pH between 7.38 and 7.44. There is evidence to suggest that a high normal arterial pH 7.43-7.45 preserves nutritional status of individuals better than a low normal arterial pH 7.36-7.38. We will test this hypothesis in a small group of stable patients with end-stage renal disease undergoing automated peritoneal dialysis. It needs to be noted that all pH levels to be attained in this study are considered to be normal. The primary outcome measure for the study will be the N-balance. The changes in blood pH will be obtained by medications ammonium chloride for lower pH and sodium bicarbonate for higher pH. 