👉 The term "crustose" refers to a type of carbohydrate that is found in plant-based foods such as grains, legumes, and fruits. Crustose carbohydrates are composed of cellulose (a form of starch) and a lignin component known as lignans, which give them their characteristic color and texture. They can also be classified based on the presence or absence of other sugars in their structure, including maltose, xylose, and fructose.