Medium-chain acyl-coenzyme A dehydrogenase deficiency

We are not aware of an association between white stool and MCADD, or of reports of people with MCADD having white stools.

Stool color is generally influenced by what a person eats, as well as by the amount of bile in the stool. Bile is a yellow-green fluid produced by the liver that digests fats. As bile travels through the gastrointestinal tract, it becomes chemically altered by enzymes, which normally change the color from green to brown.^[1]

Light-colored, white, or clay-colored stool could indicate a lack of bile in the stool. This is sometimes due to having a bile duct obstruction, or another problem with how the liver is functioning. Certain medications can also cause light-colored stools such as large doses of bismuth subsalicylate (Kaopectate, Pepto-Bismol) and other anti-diarrheal drugs.^[1]

Any sudden, or gradual, persistent changes in stool color should be evaluated by a medical professional to make sure the changes are not caused by an underlying medical problem.