Why are faeces brown?

Answer 1

Bile pigment bilirubin a waste product of the breakdown of erythrocytes, is altered by microbes in the large intestine, resulting in urobilinogen, this is then converted to STERCOBILIN which is responsible for the brown colour and deodorisation of faeces.
The brown coloration of faeces comes from a combination of bile and bilirubin, which comes from dead red blood cells.

Answer 2

poop brown coloration comes from a combination of bile and bilirubin, which comes from dead red blood cells the smell of poop is due to bacterial action. Gut flora produce compounds such as indole, skatole, and thiols (sulfur-containing compounds), as well as the inorganic gas hydrogen sulfide. These are the same compounds that are responsible for the odor of flatulence. Consumption of foods with spices may result in the spices being undigested and adding to the smell of poop The perceived bad smell of poop has been hypothesized to be a deterrent for humans, as consumption or touching it may result in sickness or infection. Of course, human perception of the smell is a subjective matter; an animal that eats poop may be attracted to its smell.

Answer 3

it is because the color of bile in your body is brown and so if theres left over your waste gets it