My son (16) was tested for food allergies 2 years ago. Positive for an onion allergy, but we told it was likely a false positive. Negative for Celiac via blood test. We didn't really make to many changes. Fast forward, EGD and colonoscopy … now he has been diagnosed with both Celiac and Eosinophilic Gastroenteritis. Celiac … not too hard to be gluten fre...