Question

what gives stool its brown color?
a.) bilirubin
b.) bile
c.) iron
d.) stercobilin

Explanation:

Bilirubin is processed in the intestines. Bacteria convert it to stercobilin. Stercobilin gives stool its brown color. Bile contains bilirubin but it's the conversion to stercobilin that causes the color. Iron can affect stool color (e.g., black if taken as supplements) but not the typical brown.

Answer:

d. Stercobilin