Method for diagnosing lactose intolerance and diagnosis kit for carrying out themethod

摘要

The method for diagnosing lactose intolerance in patients by the oral administration of defined amounts of lactose, followed by assaying metabolites of lactose, is performed in a way where the lactose administered contains 99% ¹³-labeled lactose, preferably from 5 to 30 mg, and after the administration of the ¹³C-lactose, the content of ¹³C-labeled lactose is determined in a serum sample taken at a defined time after the administration. A diagnostic kit for performing the method consists of a capsule with from 5 to 30 mg of 99% ¹³C-labeled lactose, a patient instruction manual, a blood sampling device, sample containers for collecting the blood sample, and optionally a spatula and sample container for a stool specimen.