ELI5: why is my poop green

Your poop is green because it moved through your body too fast, or you ate something green.

Think of your tummy like a food processing plant! Usually, your poop is brown because of bile, a yellowish-green liquid that helps you digest fats. Bile is like a food coloring that naturally turns your poop brown as it spends time in the plant.

But sometimes, things speed up!

• Imagine the factory conveyor belt is going super fast. The bile doesn't have enough time to change color completely. So, the green color stays! This can happen if you have diarrhea or if something you ate made your insides move faster.

• Think of eating lots of green crayons... just kidding! But eating lots of green vegetables like spinach, kale, or even food with green food coloring can make your poop green. It’s like painting the conveyor belt green from the start!

• Fast Food Processing: Food went through your body quickly, and bile didn't have time to turn brown.
• Green Ingredients: You ate a lot of green stuff that colored your poop green.