“Coeliac disease is what is known as an autoimmune condition. This is where the immune system – the body’s defence against infection – mistakenly attacks healthy tissue.NHS Choices
Coeliac disease isn't an allergy or an intolerance to gluten.
In cases of coeliac disease, the immune system mistakes substances found inside gluten as a threat to the body and attacks them.
This damages the surface of the small bowel (intestines), disrupting the body’s ability to absorb nutrients from food.
Exactly what causes the immune system to act in this way is still not entirely clear, although a combination of a person's genetic make-up and the environment appear to play a part."
This is not so very different from EGID(Eosinophilic gastrointestinal disease) although the latter rarely receives half the understanding that Coeliac Disease does, despite being far more complex and overwhelming for the sufferer. And yet - and this is the bit which *really* puzzles me - just like Coeliac Disease, EGID is NOT an IgE allergy, NOT an intolerance, and is actually a delayed, Type IV hypersensitivity - a cell mediated response and currently thought to be autoimmune in nature also.