I tend to get stomach aches if I eat too many peanuts or mixed nuts. Peanut M&M’s will do it to me. Strangely enough, drinking a soft drink like Coke or Pepsi fixes it.
I don’t drink soft drinks on a regular basis, but my wife and son drink them, so they’re in my fridge. I used to drink daily soft drinks until I figured out that those were tearing up my stomach. I drink water more than 95% of the time.