The amount of time it takes for the body to completely digest food and pass it from the body as stool is hard to estimate. There are two reasons for this: It is not easy to track the passage of food through the digestive system, and every individual and type of food is different.
As an estimate, for a healthy adult eating a standard meal, it takes around 4–5 hours for the stomach to empty and around 30–40 hours for the matter to pass through the colon.
Acids and enzymes in the stomach break down food. It then enters the gut, where bacteria break it down further. The body absorbs useful nutrients and passes the rest as waste.
As an estimate, for a healthy adult eating a standard meal, it takes around 4–5 hours for the stomach to empty and around 30–40 hours for the matter to pass through the colon.
Acids and enzymes in the stomach break down food. It then enters the gut, where bacteria break it down further. The body absorbs useful nutrients and passes the rest as waste.
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