Your Ultimate Guide to Dining Out on a Gluten-Free Diet | The gluten-free (GF) diet is one that avoids all types of gluten, a protein found in wheat, barley, rye, and other grains. It acts as a type of glue that helps foods stick together and maintain their shape. Unfortunately for those avoiding it, gluten is in many foods you wouldn't expect. #glutenfreerestaurant #tips #foodtips #foodnews #travel