What causes yellow, loose stool for an extended period of time?

Multiple: There are multiple causes and the most likely is diet.However,there are medical reason such as problems with Gallbladder,liver,pancrease,parasites,medications,gilbert syndrome and celiac disease.Cirrhosis of the liver & hepatitis reduce/eliminate bile salts that help digest food and absorb nutrients. Gallstones or sludge in the gallbladder reduces bile that reaches your intestine also