ABSTRACT

Nephrolithiasis (kidney or renal stones) [1] is a common disorder. The risk for formation of these stones can be predicted from a urine assay, indicating abnormally low levels of inhibitors (citrate [CA] and creatinine [Cr]) and high levels of crystallization promoters (oxalate [OA] and uric acid [UA]) [2,3]. The incidents of milk adulteration with melamine lead to the demand for a rapid method to assess the risk for formation of kidney stones in babies for which milk was the only diet [4].