Pale stool can be a sign of bile ducts obstruction. Grace Cary/Getty Images. Dr. Kevin Gardner answered. Pancreatic cancer may cause the stool to become a light yellow color due to lack of digestive enzymes coming from the pancreas 3.This may also cause fatigue, as food is not fully digested and nutrients cannot be absorbed. Stool that is light-colored (either pale, white, grey, or clay-colored) could indicate a lack of bile in stool. A lack of bile in the stool could be caused by a problem with the bile duct, such as an obstruction. White Poop. However, there is a rainbow of dog poop colors out there, and veterinarians will use poop colors to … Gray stool can be caused by liver dysfunction Stool will appear gray or pale because of the absence of bile salts, an important component of the bile produced by your liver and gallbladder. In order to understand why stool may appear pale to gray or even white in color, it is important to first understand why stool has a characteristic brown color. Stool that resembles clay or pale in color, may indicate a health issue affecting the biliary system in the body, such as a blockage of the bile ducts or another problem resulting in a lack of bile. Dark urine can also be a sign of biliary obstruction. The change of stool color to gray or clay typically occurs gradually as these medical conditions progress relatively slowly and stool becomes pale over time. Bile pigments from the liver give stool its brownish color. I would recommend you to visit your gastroenterologist after 2 weeks if there is no pain at site of operation. Bile salts from the liver give stool its brownish color. Stool can change color based on what you've eaten. 80% of these heme compound come from breakdown of red blood cells, but the other 20% are from different sources, containing heme. It could be anything from a vitamin B12 deficiency to a symptom of anemia.The same is true when your stool is a paler-than-normal color—it doesn’t usually happen randomly. It starts out as a yellowish green color. A blockage of the bile ducts from gallstones or a condition affecting your gallbladder, liver, pancreas, or liver can cause decreased bile output. Detailed Answer: Hello! The bile may not be draining properly. Its absolutely normal. The normal color of your dog’s poop should be close to a chocolate brown color. You likely have a varied diet and changes in your diet impact your stool. 1,2,3 Some types of cancer may cause light or pale-colored stool as well as fatigue. It is the bile that is responsible in giving the stool its normal color. Very pale or gray stools may be a worrisome sign that the biliary system is not functioning properly. Extra Hepatic Biliary Atresia is a condition where the bile drainage from the liver is poorly developed or damaged. In most cases, if your stool is light colored, you could have a problem with the biliary system. Having stool that is light colored or pale may not be normal. If there is decreased bile output, stool is much lighter in color. Save a Sample: If the strange stool color doesn't go away, bring in a sample. This means that during the process of stool formation, bilirubin is not present therefore the stool lacks the typical brown color [1,4]. For example, pale yellow stools are often associated with internal parasites, infections, food intolerance or intestinal irritation. When the digestive system is unable to properly absorb fats, stool may appear pale … Although the color of stool can be affected by different foods and medications, it is typically brownish due to digestion of bile salts, digestive agents made by the liver and stored in the gallbladder. Stool gets its normal brownish color from bile, which is excreted into … The appearance of pale stools can include a variety of light colors or tints, such as white, silver, gray, light yellow, or putty-colored. Yellow Stool Stool that is yellow may suggest the presence of undigested fat in the stool. Pale or gray Stool that is pale or grey may be caused by insufficient bile output due to conditions such as cholecystitis, gallstones, giardia parasitic infection, hepatitis, chronic pancreatitis, or cirrhosis. White or clay-like stool is caused by a lack of bile, which may indicate a serious underlying problem. A 50-year-old female asked: what causes pale color stools? Pale Stool . You should be concerned if your stools are deep red, maroon, black, or "tarry," especially if they have a noticeable odor. White stools in pets can be a symptom of excessive calcium, liver disease or tapeworms. Pale stools: Pale stools can come from different sources. 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