What you eat can generally be fully digested in 3-4 hours, and can even be completely expelled into the stomach cavity into the duodenum. Of course, this situation also depends on the specific food eaten. Because some food, such as liquid, semi-liquid food is very good digestion, about 2 hours can reach complete digestion. In the case of meat, greasy and fried food, it is difficult for the stomach cavity to be fully digested. And this situation may last longer, some can even reach 5-6 hours. So how long can you digest what you eat, also depending on what you eat, generally speaking 3-4 hours basically can be digested 80%-90 cases. This situation also has a certain relationship with their own gastrointestinal power, if the activity is relatively low or due to their own gastrointestinal disorders, poor digestive function, will also lead to a slightly longer digestion time.