Stool comes in a variety of colors, according to Michael Picco, M.D. of Mayo Clinic. Changes in stool color may be caused by medications, dietary changes or medical issues. The color is also influenced by the amount of bile in your stool. This fluid responsible for digesting fat in the body and is chemically changed by the enzymes in foods. However, there are causes to be alarmed by your stool color.
Green Stool
When stool is green, food is moving very quickly through the intestines, which means the food doesn't have time to break down. Foods that may cause green stool include green leafy vegetables and supplements such as iron, according to the Mayo Clinic. Green stool usually resolves on its own and medical attention isn't typically required.
White Stool
If there is an obstruction in the intestinal tract while digesting, white or clay-colored stool may occur. Medications such as Pepto Bismol and drugs for diarrhea may cause this type of stool, according to the Mayo Clinic. This issue usually resolves on its own, and medical attention isn't typically required.
Yellow or Foul-Smelling Stool
If there is too much fat in the stool, it may become greasy in appearance, yellow and smell badly. This can be a sign of an issue with absorption in your digestive tract, like celiac disease, according to the Mayo Clinic. In these cases, it's important to contact your doctor for an evaluation.
Black Stool
Black stool may be a sign of gastrointestinal bleeding. However, this may also be caused by dietary supplements or Pepto Bismol. Consult your doctor if stool is black in color.
Bright Red Stool
Bright red stool may indicate bleeding in the intestines, according to the Mayo Clinic. However, it may also be caused by foods such as beets, cranberries or drinking Kool-Aid. Consult your doctor to rule out health complications.
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