A growing number of people are following gluten-free diets. For many it’s because this protein can make them unwell. It’s in a huge amount of food and drink products and it’s hard to avoid – but what does gluten actually look like?

Baker Lizzie Parle of the E5 Bakehouse in London demonstrates the properties of gluten, by pumping it up like a balloon. BBC’s The Food Chain visited her bakery as part of a programme devoted to the issue of gluten.

Video Journalist: Dougal Shaw

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