Pizza is high in calories, providing up to 989 KJ of energy per 100 grams of pizza. Commonly referred to as pizza, pizza is usually prepared by covering a round doughy crust with meat, cheese, fruit, tomato sauce or other toppings and baked in an oven, and is used as a staple food by some groups of people. Research shows that every 100 grams of pizza provides 989KJ of energy, while every 100 grams of rice provides 496KJ of energy, and pizza is about double the energy of rice. Pizza not only contains relatively high energy, but also contains certain nutrients, to some kind of pizza, for example, per 100 grams of pizza contains protein 16.5g, fat 6.8g, vitamin A49μg, vitamin C0.02g, but also contains calcium, potassium, magnesium, copper and other minerals, moderate consumption of pizza can be supplemented with nutrients and energy required by the body, to maintain the body’s normal physiological functions. The calorie content of pizza is relatively high and should not be consumed in excess. If a large amount of food can lead to excessive calorie intake, excess calories can be converted to fat accumulation in the body, long-term will have overweight or obesity risk.