2. There are three main raw materials for making popcorn, namely corn, rice and millet. The popcorn we usually eat is made of corn and butter, ghee, sugar and other accessories. Popcorn generally contains a lot of dietary fiber, folic acid, zinc, copper, manganese, iron, riboflavin and thiamine and other nutrients. Popcorn is high in calories and can quickly replenish energy for the human body.