The same amount of steamed bread has higher calories than rice. The energy of 100g steamed bread is about 223kcal, and that of 100g rice is about 1 16kcal. Both of them are starchy foods, but the high water content of rice reduces its food calories. Steamed bread is fermented from flour, and its main nutrient is carbohydrate, which is the basic food for people to supplement energy. Steamed bread contains an edible and nutritious unicellular microorganism-yeast. It can provide vitamins, minerals and other nutrients needed by human body except protein, carbohydrates and lipids.