They point out that celiac disease can lead to diarrhea, constipation, weight loss, malnutrition, irritability, osteoporosis, infertility, colon cancer (and the list goes on!) if left unchecked. My husband had weight loss, malnutrition and also neurological issues with tingling face, hands and feet.
And after you are diagnosed you shouldn’t cheat, even if you don’t have any obvious reaction, because your body is still being damaged.