An excessive appetite is often a sign of yeast or bacteria overgrowth in the digestive system, or even intestinal parasites. With a sever candidiasis large portions of the food are consumed to keep the overgrowth alive. Poor digestion or blood sugar dysregulation can also contribute to an excessive appetite. A person has to eat more food in order to get a small amount digested and absorbed.
Other Indications
Blood sugar dysregulation
Reference: Weatherby, D. (2004). Signs and Symptoms Analysis from a Functional Perspective. Jacksonville, OR: Bear Mountain Publishing.