Why is Faeces Color normally brown ?
141794
Red blood cells are continually being broken down and replaced. The main byproduct of this process is called bilirubin, which is (specifically) a breakdown product of hemoglobin, the molecule in red blood cells that carries oxygen. Bilirubin (like many other biochemical wastes) is dumped by the liver into the large intestine via the gall bladder. Stuff that the gall bladder secretes (including bilirubin) is called 'bile', and it is the characteristic color of bile (the main component of which is bilirubin) that gives feces its typical color. Without bile, feces would probably be the color of vomit, as you might expect (but not really like to think about).
469553
It is because secreted into the bowel are two substances which colour it - Bilirubin which is redish, and biliverdin which is greenish. Put them together and you get brown.
361738
Bile is actually yellowish, the brown colour is a result of the digestive processes as it passes through the small & large intestines.
661961
Bile pigments.  The specific compound responsible is called bilirubin.\n\nThat said, try drinking a lot of grape gatorade and eating a lot of black licorice and see what color you get.  It won't be brown.  :)
430367
It's perfectly normal.  I have brown discharge from my anus every day.
780979
enzymes react with the air to make the brown color.
366414
Yes it is normal.  As air hits the menstration, it oxides and turns brown.  Also, the closer you get to end of you cycle, the menstration is older and will appear darker red and brown.  It's perfectly normal...don't worry.
258996
Because it's Brown (and sometimes runny)
476672
It's a common misconception that your food comes out either as pee or poop or some ratio depending upon it's state of matter before being eaten. In fact, the different sources of energy (i.e. fats and carbs) as well as proteins, undergo catabolism so much that the waste products are nothing like them at all. In any case, feces (poop) is what is never actually absorbed by your body. Anything that is taken up by the body and used is in the urine (pee). This is mostly water, salt, and urea (broken down proteins).
119662
do you mean the meconium?  It is a dark green or black tarry fecal matter that is discharged shortly after birth.
8008
This could be a very serious condition, see a doctor if this is happening to you.\nIt could mean that your intestines are bleeding (very serious). The higher up the bleeding is in the GI tract, the darker the stool will be. Or, it could be a high level of iron ingestion or certain medications, like pepto bismol.
465994
Rectal bleeding has many causes including hemorrhoids, Crohn's Disease, fissures, peptic ulcer disease, polyps, amongst other reasons. Most rectal bleeding comes from the colon, rectum, or anus. The color of the blood often depends on the location of the bleeding in the gastrointestinal tract. The closer the bleeding site is to the anus, the blood will be a brighter red. Bleeding from the transverse colon and the right colon tend to be dark red or maroon colored. It would be best to see your doctor to determine what the exact cause may be.
75066
Humus is typically dark brown to black in color. More likely, the brown comes from organic materials or iron and iron oxides.
763872
This is very normal.  Once your periods start to become regular and heavier, your blood will take on a redder color.  It's brown because you aren't bleeding very much.  Your pee is darker because the outside of your vagina has a residue of blood on it from your period.  As you mentioned earlier, you also have dried blood in your hair.  Your pee is going through all this dried blood as it comes out and so it takes on a different color.\n\nDo your best to stay clean by showering every day.  If the blood and stickiness really bothers you, buy some feminine wipes to clean yourself each time you change your pad.  Always just came out with pads that include a wipe with each one, you  might want to try those.
879294
Feces can vary depending on diet. Generally, it should be formed, and soft to slightly firm.
493785
Blood in the stool can be bright red, maroon in color, black and tarry, or occult (not visible to the naked eye). Causes of blood in stool range from harmless, annoying conditions of the gastrointestinal tract such as hemorrhoids to serious conditions such as cancer. Blood in the stool should be evaluated by a healthcare professional. \n\nRectal bleeding (known medically as hematochezia) refers to passage of bright red blood from the anus, often mixed with stool and/or blood clots. Most rectal bleeding comes from the colon, rectum, or anus. The color of the blood during rectal bleeding often depends on the location of the bleeding in the gastrointestinal tract. Generally, the closer the bleeding site is to the anus, the blood will be a brighter red. Thus, bleeding from the anus, rectum, and the sigmoid colon tend to be bright red, whereas bleeding from the transverse colon and the right colon (transverse and right colon are several feet away from the anus) tend to be dark red or maroon colored. \n\nIn some patients bleeding can be black and “tarry” (sticky) and foul smelling. The black, smelly and tarry stool is called melena. Melena occurs when the blood is in the colon long enough for the bacteria in the colon to break it down into chemicals (hematin) that are black. Therefore, melena usually signifies bleeding is from the upper gastrointestinal tract (for example: bleeding from ulcers in the stomach or the duodenum or from the small intestine) because the blood usually is in the gastrointestinal tract for a longer period of time before it exits the body. Sometimes melena may occur with bleeding from the right colon. On the other hand, blood from the sigmoid colon and the rectum usually does not stay in the colon long enough for the bacteria to turn it black. Rarely, massive bleeding from the right colon, from the small intestine, or from ulcers of the stomach or duodenal can cause rapid transit of the blood through the gastrointestinal tract and result in bright red rectal bleeding. In these situations, the blood is moving through the colon so rapidly that there is not enough time for the bacteria to turn the blood black.\n\nSometimes, bleeding from the gastrointestinal tract can be too slow to cause either rectal bleeding or melena. In these patients bleeding is occult (not visible to the naked eyes). The blood is found only by testing the stool for blood (fecal occult blood testing) in the laboratory. Occult bleeding has many of the same causes as rectal bleeding and may result in the same symptoms as rectal bleeding. It is often associated with anemia that is due to loss of iron along with the blood (iron deficiency anemia). For more information, please see the colon cancer screening and fecal occult blood test .Causes of Rectal Bleeding\n\nAnal Fissure \nColon Cancer \nColon Polyps \nCrohn's Disease \nDiverticulitis (Diverticulosis) \nHemorrhoids \nPeptic Ulcer \nStomach Cancer \nOther Causes of Rectal Bleeding\n\nEsophageal Varices
284817
Healthy people can have green poop if they eat a diet rich in leafy green vegetables, or if they consume large quantities of food coloring (in ice cream, cake frosting etc.). \n    Green poop can also be caused by excess iron in the diet, from dietary supplements, for example. If the body does not absorb all the iron consumed, the iron may stain the poop green, the color of iron (II) salts. Ordinarily, the green color may be masked by the normal brown poop color, but if digestion is thrown off by illness so that bilirubin is less concentrated in the intestine, the green color may become apparent. This can happen when a person is afflicted with diarrhea. \n    Green poop in sick babies may come from iron in baby formula not being properly absorbed, or by green pigments in bile salts (again, green from iron).