Vegetables contain less fat without meat, so many people think eating vegetables can ensure health. Zeng Qing Shan, a doctor of Nutrition Department in Guangzhou No.3 People's Hospital said that compared with non-vegetarian dishes, pure vegetable dishes were less delicious, so in the cooking process, people generally use more oil and seasoning to increase the flavor and taste of the dish. In this way, people would unconsciously intake more invisible fat.