Gluten is a group of protein in cereals, especially wheat. Wheat is very similar to rye and barley. So these grains also contain gluten. Gluten gives the dough a solid structure. In the proofing process of bread processing, gluten forms a network structure. Without gluten, this structure cannot be formed and bread cannot be fermented.
Gluten-free food:
1, people who follow a gluten-free diet can't eat any food made of wheat, rye or barley, such as cakes.
2. Some processed foods, such as soy sauce and pie fillings, usually contain gluten unless otherwise specified. Therefore, gluten-free dieters who are worried about food ingredients had better choose fresh ingredients.
In drinks, beer should be avoided first. Although products made from barley and malt contain gluten, most alcoholic beverages (beer is fermented from wheat and red wine is not fermented from wine) and non-alcoholic beverages do not contain this ingredient.
Refer to the above? Baidu encyclopedia-gluten-free diet