I-FABP is a reliable marker for intestinal damage and has been proved to respond more swiftly than traditional serology to enterocyte injury in celiac patients who do not a gluten free diet. In this study a pediatric population of celiac patients will be tested for I-FABP levels during initial endoscopic diagnosis and during one year of follow up. Their levels will be compared to a control group of pediatric patients undergoing endoscopy for reasons other than suspicion of celiac disease. During the period of follow up, the test group will undergo repeat testing for I-FABP levels, as well as the traditional follow up testing for serology in celiac patients and a questionnaire regarding. The results will be analyzed in the hope of finding a way to use I-FABP as a more direct, accurate marker of disease activity, and of correlations between it's level and the patient's Marsh score at diagnosis.