Fermented cereal beverages are drinks made by fermenting grains such as barley, wheat, or rice. This process involves adding specific microorganisms, like yeast or bacteria, which convert sugars in the grains into alcohol or acids. These beverages can vary in flavor, texture, and alcohol content, depending on the fermentation process and ingredients used. Common examples of fermented cereal beverages include beer, which is made primarily from barley, and sake, a traditional Japanese drink made from rice. These beverages not only offer unique tastes but also provide potential health benefits, such as improved digestion and enhanced nutrient absorption.