Certain viral gastrointestinal infections can speed up the transit time of stool moving through your digestive tract, leading to diarrhea and the presence of undigested food. It doesn’t necessarily signal a problem.  What Else Is There: Other Signs and Symptoms. Sometimes parasites or their eggs are seen under the microscope, suggesting that … In a person with jaundice, stool with excess fat indicates decreased production or secretion of bile. Undigested food fragments may mean that food passes through the intestine too rapidly. Be aware that all diseases causing malabsorption can cause undigested food particles in the stool. Gastroparesis is a condition in which food stays in your stomach for longer than it should. This is even true with Candida in the stool. Candida is a type of yeast that resides in many parts of the body. Undigested food in stools can be a troublesome thing, and many parents do not know what to do about it. Other clinical manifestations can observed in the presence of undigested food particles in stools. Aside from having undigested food particles in the stools, patients with this condition may also have abdominal cramps, flatulence, loose stools and weight loss. These are as follows: [11, 12, 13] Learn more about gastroparesis causes, symptoms, complications, diagnosis, treatment, and diet changes. undigested food in stool; weak, brittle fingernails; fatigue; GI infections; iron deficiency anemia; deficiencies of other minerals, such as vitamin B-12, calcium, and magnesium; protein deficiency; Let Dr Dan Thomas, MD explain what you should and should not worry about in regards to unigested food in stools.