My father has developed celiac disease. what is it exactly?

Toxic wheat effect: Gluten in wheat acts as a toxin on your small intestine. The toxic injury leads to a marked decrease in the ability to absorb nutrients in any food that you eat. The immediate result is abdominal distension, pain, bloating & diarrhea. The long term effects is weight loss, muscle wasting & weakness - in fact, all of the symptoms of starvation.

Toxic wheat effect: Gluten in wheat acts as a toxin on your small intestine. The toxic injury leads to a marked decrease in the ability to absorb nutrients in any food that you eat. The immediate result is abdominal distension, pain, bloating & diarrhea. The long term effects is weight loss, muscle wasting & weakness - in fact, all of the symptoms of starvation.

Immune injury: Your father had an immune reaction to one or more of the proteins in gluten.This is commonly found in wheat/rye/barley. His body developed antibodies to this protein & these mistakenly attack the intestine where it is digested. The attack injures the tissue and leads to a variety of symptoms/complications. Any future exposure to gluten can trigger new antibodies/injury.Avoidance can help it heal.