<<Disclaimer: Verify this information before applying it to your situation.>>

The classic reaction is Celiac Disease, a slow progressive damage to the villi of the small intestine. It begins in the duodenum, where iron should be absorbed, lactase should be made, and where the hormone to tell the gallbladder to dump should be made. Thus iron deficient anemia, lactose intolerance, and gallbladder problems should be red flags for this condition. Poor gallbladder function means poor absorption of fats and oil soluble vitamins, with dry skin a common symptom. As the damage spreads, the celiac may eat more and more just to maintain a normal weight, or may lose weight no matter how much they eat. Deficiency symptoms that eventually occur can include anemia, sore mouth, numb or tingly feet, even senile dementia, from B12 deficiency. Poor dream recall, stiff hands, sciatica or carpal tunnel syndrome, and eventually arthritis may result from B6 deficiency. Depression or grouchiness from B3 deficiency. Anemia, fatigue, cervical dysplasia, fibrocystic breasts, miscarriage, or birth defects from folic acid deficiency. Low thyroid function and fibrocystic breasts from iodine deficiency. Poor sense of taste and smell, stretch marks, body odor, smelly feet, white flecks on the fingernails from zinc deficiency. Poor night vision from zinc and vitamin A deficiency. In general the damage done to the intestine probably leads to leaky gut and susceptibility to Candida overgrowth. But intestinal damage is only the classic reaction, and years of other symptoms may precede them. 

Gluten and a similar protein found in dairy products, casein, both resemble opiates. Some people become very sleepy after meals containing wheat. Severe cases have been diagnosed as "narcolepsy". Others may develop panic attacks. ADD and ADHD have been associated with gluten intolerance. Autism has been repeatedly been associated with gluten and/or casein. Many cases of schizophrenia have been caused or worsened by gluten. Any regular intake of an opiate-like substance implies that addiction could take place, and certainly many people have admitted a sort of addiction to baked goods or dairy products. 

Many "incurable" autoimmune diseases such as rheumatoid arthritis, lupus, MS, thyroiditis, pancreatitis, and juvenile diabetes have been linked to gluten and/or casein. In vitro tests have shown that when gluten is added to the blood of celiacs, the cells that fight cancer stop working. Non Hodgkins Lymphoma is the #1 cause of death in untreated celiacs. 

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