When some of the food we eat is not broken down into tiny particles in the digestive system, it may pass through the digestive system relatively unchanged and be eliminated from the body as feces.
Fiber, for example, is a type of carbohydrate found in plant-based foods that cannot be broken down by human digestive enzymes. Instead, it passes through the digestive system mostly intact and provides bulk to the feces, helping to promote regular bowel movements and prevent constipation.
Other substances that are not broken down in the digestive system may be absorbed into the bloodstream and transported to the liver for further processing or elimination from the body. For example, alcohol is absorbed through the stomach and small intestine walls and is metabolized by the liver.
In some cases, undigested food may cause digestive discomfort or symptoms such as bloating or gas. In others, it may be associated with more serious conditions such as malabsorption syndromes, inflammatory bowel disease, or other digestive disorders. If you experience persistent digestive symptoms or concerns, it is important to consult a healthcare professional for evaluation and treatment.