[Urinary lactose determination].

The authors suggests a modified method for nonchromatographic measurement of urinary lactose. The minimal detectable lactose volume is 0.5 g/l. Eighty-four children, mostly babies, with lactose intolerance were examined, breast-fed or formula-fed with lactose-containing mixtures. Lactosuria was detected in 27.4% of the examinees. Urinary lactose levels were (mean +/- m) 0.69 +/- 0.02 g/l. No lactosuria was detected by this method in 29 babies without lactose tolerance (control group).