It is a type of carbohydrate that is found in many plants and is an important part of human diet as well as pet food. Among the important sources of starch, we can mention corn, wheat and potatoes, which contain a large collection of glucose molecules. Starch has many uses and it is also used in food and manufacturing industries. Starch, which is used in food, causes thickening and cohesion in them. Some of the foods that can be added to their concentration by adding starch are: puddings, all kinds of sauces, soups, pie dough, seasoning and salad additives and many other foods. Of course, a type of starch is also used in foods that cannot be heated. In the past, the only main source of starch was wheat. But with the passage of time, starch was extracted from potato and corn and they were used a lot. The types of starch are: corn starch, wheat starch and flower starch.