You need to trim the fat
Now that we've talked about green diarrhea, let's talk food. A high-fat diet can actually be good for you, but not so great for your bowel movements. "If you eat a high-fat diet, then you will need more bile to digest these fats," says Dr. Sam. This is another way the bright-colored bile makes its way into your toilet bowl.
You're addicted to kale
By now you're aware that a diet rich in leafy greens, especially kale and spinach, is really good for you. The only downside (besides being smug about it to your unhealthy friends), according to Dr. Sam, is that it could turn your poop the same color as your favorite veggies. It takes a lot of kale to make this happen, but between green juices and bottomless kale salads, it's totally doable and not that uncommon.
Well, maybe not the throwback juice box per se, but any food that's dyed a radiant green or purple color could be a culprit. Things like colored icing, artificially dyed beverages, and any other food with bright, unnatural colors could all make their way into your poop, and totally change the typically brown color. Rainbow poop? Sounds like it could be fun.