Gluten is a protein that’s found in wheat, barley and rye. Around one in 100 people in the UK have coeliac disease (although around three quarters don’t know they have the disease). In people who have coeliac disease, the immune system reacts to gluten. This causes damage to the lining of the gut causing symptoms such as bloating, diarrhoea, nausea and abdominal pain. The only treatment is a gluten-free diet for life. All plain fish – white, oily or shellfish – is gluten-free. However, any fish that’s coated in flour, breadcrumbs or batter, or comes with a sauce that’s made with flour needs to be avoided if you need a gluten-free diet.
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