Plant starch is a type of carbohydrate found in many plants, and it is an important source of energy for humans. Two common types of plant starch are SAGO and inulin. SAGO is a starch extracted from the pith of certain tropical palm trees, while inulin is a type of fructan found in many fruits, vegetables, and grains. Both SAGO and inulin are used as food additives and as ingredients in processed foods.