Stool Color
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Cause
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Food That Produces Color
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What You Should Do
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Brown
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Normal
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Almost all foods produce brown stool. The brown color comes from the bacteria that occur naturally in the intestines
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Nothing. If its medium soft, about the size of a small banana, you're fine. If it's marble sized, you're constipated.
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Mucus
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Normal
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None. Mucus comes from the intestines themselves. Only if a lot of mucus is present, is there a concern. If so, get checked for Crohn's or ulcerative colitis
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See a doctor only if there's a lot of mucus, if it continues for more than a week or two or if there's red from blood.
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Green
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Bile. Your food is moving through the intestines too fast. As a result, the bile stays green --not brown, as it does when it has time to process the food and finish breaking it down. Green or darkish stool is normal in infants who are fed formula. In addition, all babies (even those who are breast fed), pass a first stool called the "meconium" which is slimy and green and is passed only once. After that, normal patterns settle in
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Diarrhea can produce green stool. Diarrhea means the food is moving too fast through the intestines. Bile is naturally greenish-yellow. As it moves through the intestines, enzymes turn the bile brown. (Read more about how to stop diarrhea.)
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Yellow
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Excess fat in the intestines. Oily, yellow stools can also mean that you have a disorder which makes your intestines unable to break down oily food. Yellow or mustard colored stools are normal in breast-fed infants. Yellow stools in infants can also indicate bilaria atresia. Less common causes of yellow stools include Gilbert's syndrome.
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Gluten (Read more about quinoa and other gluten-free foods).
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See a doctor if it continues to rule out Celiac's disease
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Red
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Depends on what makes it red. If it's blood, see a doctor and be screened for colon cancer, Crohn's and ulcerative colitis. (Read more about causes of blood in your stools.)
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Beets, Red Kool-aid or other dry powder drinks, peppers, even tomatoes and tomato sauce, pepperoni sausages. Other causes are Diazepam syrup, phenopthalein, medications such as Ampicillin Viprynium or Dioralyteoral rehydration solution.
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If it's blood, see a doctor, could be colon cancer, Crohn's or ulcerative colitis.
Blood in stools accompanied by diarrhea is a symptom of food poisoning. (Read more about common causes of and remedies for food poisoning.)
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White, Pale or Clay Colored
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Not enough bile. Your bile would change this color of your stool to brown
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Bread, flour, rice
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Your bile duct may have an obstruction. Or your medications could be the cause (even over-the-counter meds like Kaopectate, Pepto Bismol, Tums). If the white or light color continues, see a doctor
Pale or clay-colored stools can also indicate problems in the biliary drainage system, which affects your pancreas, liver and gallbladder. The condition is called acolic stools. Typically, your skin also turns yellow (jaundice) when you have acolic stools. Other conditions that can produce pale or clay colored stools include alcoholism, gallstones, liver cirrhosis, cysts and cancer.
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Black or Dark Green
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Iron. Or, it could also mean that your stomach or GI tract is bleeding.
Pepto Bismol can also turn stools black due to the ingredient "bismuth subsalicylate".
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Iron pills, liver, meats, dark vegetables such as spinach or kale, broccoli, black licorice, black olives
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Usually clears up on its own once you re-balance your diet. See a doctor if it continues because it could mean your stomach is bleeding
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