A gluten-free diet is a dietary plan that excludes gluten, a protein found in grains like wheat, barley, and rye. People with conditions such as celiac disease or gluten sensitivity must avoid gluten to prevent health issues. This diet focuses on consuming foods like fruits, vegetables, meat, fish, and gluten-free grains such as rice and quinoa. Many packaged foods are now available that are specifically labeled as gluten-free, making it easier for those who need to follow this diet. However, it's important for individuals to read labels carefully, as gluten can be hidden in various processed foods and sauces.