Corn has the highest starch content. One cup of yellow corn may contain around 110 g of starch. Corn on its own is a good source of fiber and essential B vitamins and has some health benefits if eaten in moderation. On the other hand, corn starch, or cornflour, is the starch derived from corn (maize) grain and is very high in calories and carbs and very low in nutrients your body needs. Corn starch is a common food ingredient that we like to use when we need our sauce or soup slightly thicker. It is also used to make corn syrup.