often runs in families, if someone has a close relative with condition their chance of developing coeliac is higher
research has shown it is strongly associated with number of genetic mutations that affect a group of genes (HLA-DQ genes) that are responsible for development of immune system
these mutated genes are, however very common and so it is thought that environmental factors must trigger the condition in certain people
there is evidence that introducing gluten into a baby's diet before six months may increase risk of developing condition