Gluten is found in wheat, barley, rye and most oats and can cause health concerns for people with Coeliac disease or gluten sensitivity. Coeliac disease affects about 1% of the population although it is believed that up to 75% of cases go undiagnosed. Gluten sensitivity is said to affect 6 – 10% of the population; gluten sensitivity is considered to be where you have been tested negative for Coeliac disease but show improvement in your health when gluten is removed from the diet.