Whether you are lying down or standing up does not have much of an effect on the speed of food digestion. The speed of food digestion is mainly affected by the type of food, such as starch, meat, fruits and vegetables. 1. Starch: rice, steamed buns, noodles and other foods made from refined rice and white flour are digested and absorbed at the fastest rate, while the digestion and absorption of starch in coarse grains and beans is significantly slower. 2. Meat: the digestion of meat is slow, it takes about 4 to 6 hours, the higher the fat content of meat digestion time is longer. 3. Fruits and vegetables: the digestion time of vegetables is about 1 to 2 hours, of which melon vegetables, such as cucumber, winter melon digestion is the fastest; leafy, bamboo shoots contain a large number of vegetables with cellulose, digestion is slower. To summarize, starch has the fastest emptying speed, meat has the slowest emptying speed, and protein has the middle speed. When indigestion occurs, it is recommended to seek medical attention and choose the appropriate treatment under the guidance of your doctor.