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What makes poo green?
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For more on marking an answer as the "Best Answer", please visit our FAQ.Okay - all you ever wanted to know about sh*t but were afraid to ask... The gallbladder releases something called bile into the duodenum (just past the stomach) in order to help emulsify fats. The bile works by making the fat droplets smaller and so easier to absorb into the blood. The bile is made up of cholesterol, bile pigments (broken down from haemoglobin in the blood) and some other stuff.. The are two main pigments - bilirubin and biliverdin. Bilirubin is conjugated with glucuronic acid in liver cells and released into the gut. Some of this is reabsorbed into the liver and the rest undergo reactions by gut bacteria turning the conjugated bilirubin into urobilinogen. This is either reabsorbed and excreted by the kidneys (urine) or converted to stercobilin. The stercobilin is what makes the faeces brown. So, basically, varying levels of this alter the colour of the faeces. Bile by nature is green (biliverdin the other pigment has something to do with this and undergoes similar reactions to bilirubin).. basically, different colours are to do with different levels of pigment.. Different levels of pigment can be affected by different diseases, food, drinks... you name it..
I'm a doc, work in GI - means I deal with sh*t everyday
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