What is Gluten Free? What are Gluten-Foods?

Today, there are a lot of articles on internet that discuss about gluten-foods (as the name suggests, they are foods that contain gluten). Gluten is a specific protein that can be found in certain foods. It should be avoided by people with celiac disease. What is gluten free? And why do people need to do a celiac disease diet or gluten-free diet?

You might also like to read can you use gluten