A polysaccharide or polymer composed of glucose units, such as starch or cellulose.
From glucose + -an, a suffix used in carbohydrate chemistry to denote polymers. The term generalizes to any large molecule built from glucose building blocks.
Glucosans are the superpolymers hiding in your food—starch in potatoes and cellulose in vegetables are both glucosans made from thousands of linked glucose molecules, but your body can digest one and not the other.
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