Often, celiac disease causes mild discomfort. However, complications of celiac disease are mainly observed in underdiagnosed persons or those who continue to take gluten-rich food after diagnosis. Long-term complications of celiac disease include osteoporosis, malnutrition, iron deficiency anaemia, pernicious or vitamin B12 deficiency anaemia, folate deficiency anaemia, and small bowel cancer. Besides, coeliac disease during pregnancy can lead to low birth weight in newborns.