Normal color of feces is varying degrees of brown and it causes concern when you notice any change in color of stool. Not many of you is familiar, that it is bacteria that gives the required brown color to the stool and leftover things that is excreted through anus.
The bile in the liver varies from dark green to yellowish brown in color. Bile is released into the duodenum (a small tubing next to the stomach) once you eat anything helping in the process of digestion. Plenty of bacteria (good) is present in the digestive system which acts on the food during digestion and the leftover food particles turns brown in color due to the presence of red blood cells and waste particles of bacteria. Bacteria involves in the process of absorption of nutrients from the food you eat making it brown. Feces can get colored green due to various factors. It can be due to what you ate last night.
Some of the causes that makes your stool green are discussed here :-
1. Foods
Certain foods like spinach, broccoli, kale and dark green vegetables can change the normal color of stool making it greenish. Blueberries and several green veggies contain plenty of chlorophyll content which can turn your stool color to green.
Even processed foods that are of various colors like blue or purple can change the normal stool color. Such items can move quickly through the intestine giving no chance to bile to work on them causing green stool.
2. Improper Breakdown Of Bile
Bile fluid gets released when you eat something to facilitate the digestion process. Fat particles of the food would break down properly due to the presence of bile. In this process bile has to be broken down while passing through the intestine. But due to some digestive problems like diarrhea or stomach cramps, bile content along with food would go past the intestine without getting fully absorbed resulting in green stool in the morning.