Black stool

anyone else get black poos the day after eating blueberries? I wonder if IBS has anything to do with it as it tends to tint my poos black for the next day

As long as it is just after you’ve eaten blueberries. If you have it on other days too, you need to get it investigated as it may indicate blood in your stool. I’m not trying to alarm you, I just want you to be aware of it. 

Avoid bluberries to see if this stops.  It sounds like you are nit absorbing these fruits well.  Do you have IBS?