Of course, fructose isn't the only possible culprit when it comes to blueberries and diarrhea. Some people might be allergic to blueberries themselves, or have an intolerance to other compounds found in the fruit. It's like trying to solve a mystery - you have to consider all the possible clues before you can figure out what's really going on.
Do Blueberries Cause Black Poop In Babies at Randy Eubanks blog
And then there's the fact that blueberries are a type of fiber-rich food, which can be great for your digestive system - but only if you're used to eating it. If you're not, it's like trying to shock your system - it can cause some pretty uncomfortable symptoms, including diarrhea.
