And why is fecal matter sometimes a different color?
While this question might seem like a simple biological curiosity, doctors will likely tell you that the color of your poop is no laughing matter. That's because poop isn't always brown, and when it's not, it can tell you a lot about what's happening inside your body.
Stercobilin is responsible for the brown color of human feces."It should be pointed out that human feces are usually light to dark brown in color and are composed of a combination of the bilirubin derivatives, mainly stercobilin and some urobilin," Wang explained."The longer stercobilin is oxidized, the darker the stool will be. The color of feces also depends on the freshness of the stool, the concentration of stercobilin, and the stercobilin/urobilin ratio.
"In some cases, certain foods can change the color of feces," Wang said."For example, feces can be green due to eating licorice candy, as it is typically made with anise oil rather than licorice herb. Feces may turn black if a certain amount of the food containing animal blood is consumed." "Under normal physiological conditions, human feces are light brown to dark brown in color," Wang said."In some pathological conditions, the color of the stool changes. For example, when any type of bile duct is obstructed [which can occur due to a range of conditions ], it usually results in a tarnished silver or aluminum paint-like stool color."—Why is grass green?
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