The intestinal problems I'm referring to are caused by too much acid reaching the intestines. I've found that some packaged juices such as grape juice, tomato juice and apple juice, contain a lot of acid and can eventually cause intestinal pain when overdone. I attribute that to the acid eating away at the lining of the GI tract and causing irritation and ulcers. The obvious thing that's called for in those cases is to cut out these beverages. However, even though I used to suffer from such GI tract irritation to where I had to cut out my favorite beverages, I found a way to get around that problem and drink all the fruit juices I wanted without any problems at all and have been doing so for many years now. What I found is that if non-alcoholic "beer" or brew (I prefer Miller or Coors) is drunk at the same time as these juices (I mix them together for a good fizzy drink) I can, and do, drink as much juice as I want without any of the normal problems I used to get. Plus I find it to be a healthy and tasty alternative to soda drinks. I don't know what it is about beer that neutralizes the effects of acid in the GI tract, but it works every time.