Posted 11/22/2013 7:08 PM (GMT 0)
dietary causes for green stool are iron supplements and green food coloring, which can be found in flavored drink mixes, ice pops and birthday-cake icing.
Bile — a fat-digesting yellow-green fluid that's secreted by the liver and stored in the gallbladder — can also cause green poop.
"As bile pigments travel through your gastrointestinal tract, they are chemically altered by enzymes, changing the pigments from green to brown,"
However, if food is moving through your large intestine too quickly, the bile doesn't have time to break down completely and stains your stool green, rather than brown.