Coeliac disease
Coeliac disease is genetic and relatives (such as children, siblings, parents) with this disease have a 1 in 10 chance of developing coeliac disease. This means that the person affected by it is born with genes that cause the immune system to react poorly to gluten. However, Coeliac disease is not always present during childhood. It can be triggered as an adult by an event such as hormone shifts or illness.