Study on pancreatic lactase 1 is a reliable test for detecting pancreatic weakness." This assumption is unfortunately wrong, as my own experience, but also the results of Dr. Summer (see "The panel doctor", show. First three samples must be taken as possible on consecutive days. Second, despite normal values for lactase 1 dysfunction exist, which can only be fitness tip compensated by the administration of digestive enzymes. Otherwise, symptoms may occur over time, which are generally described as irritable bowel syndrome. Kurt Schmidt 60431 Frankfurt Author's Response: I also occasionally see that patients with more normal pancreatic lactase-values (egg just over 200 mg / g benefit from enzyme therapy. But then I find in the stool examination also evidence of impairment of fat digestion, and the patient is this..