FORMATION of stones within the urinary tract is a complication of many varied metabolic disorders.1 The nutritional aspects of urolithiasis, especially if one includes fluid intake, are important in both cause and treatment. From the time of Hippocrates, the benefit of maintaining a high urine flow in patients with urinary calculi has been recognized, and recent publications contain a number of reports that recurrent stone formation in varied disorders has been controlled in the majority of cases with diet adjustment and adequate fluid intake to maintain the urine volume above 2500 ml per 24 hours.2 Too often, this fundamental feature . . .