There are various reasons why you poop or stool is green, the most important thing to understand is that only a medical doctor can properly diagnose your condition as there is no substitute for a professional opinion. I will try to explain the most common reason why when you went to the bathroom you noticed your poop was green, I will also like to share how to keep track of when it might happen again. This is a slightley different topic from what we normally talk about but since we are eating all of this food we might as well address a few problems and questions that come our way.
Important note: Symptoms
Remember, if you are in pain or if you feel sick and it had lasted more than a few days you should make an appointment with a dr to get properly diagnosed. If you are not feeling any discomfort and have just noticed a green stool today than you can probably relax a little bit wait a few days and you should be fine.
I noticed my poop is green! What do I do?!
First of all just relax and take a moment to think about what you have had in your diet lately, what have you eaten the past few days? The most common reason for your discoloration or, ahem, coloration of the poop is something you consumed over the last few days. Why in the last few days? Typically it takes anywhere from 2-3 days for most foods to digest properly in your stomach and pass through to the toilet.
What caused the coloration in the toilet?
More than likely the common culprit are green vegetables or food coloring, for instance the last time i noticed a green stool it was the day after a birthday party and thinking back to the party I remember eating a birthday cake that was covered in blue green frosting. Boy oh boy that frosting tasted great that day but the next day I was super shocked to see my poop so green! I kinda freaked out a bit before I knew that food coloring could change the color from normal brown to green. The same thing can happen to you, just try to remember if you had a drink or some food that was colored, possibly from some sort of special event you went to and ate a lot of food. The same thing is possible if you eat a lot of green vegetables, the vegetable can turn your stool a foreign color. However do note that this should not last more than 3-4 days.