White and yellow stools are related to diet, indigestion, liver and gallbladder diseases, etc. Under normal circumstances, the human body excretes pale yellow, banana-shaped stools. First of all, if the color of the stool is found to be white, the main consideration and diet is directly related. Some people often eat white food in the diet, such as sweet potatoes, food intake is not easily digested and absorbed, so the color of the stool will appear white. Some people have light white stool color, mainly considered to be caused by indigestion. In the diet often eat high-protein, fatty foods, due to the body’s malabsorption, excessive fat will be excreted with the stool, resulting in the color of the stool becomes lighter, easy to appear clay-like stool. Secondly, it can be considered to be caused by diseases of the liver and gallbladder, commonly caused by extrahepatic bile duct obstruction. Bile is often yellowish green in color and enters the intestines and mixes with food residue in the intestines, resulting in yellowish colored stools. If the bile cannot enter the intestinal tract, it cannot mix with the stool, so it will make the stool white in color.