Just my experience - (after losing 40 pounds) I've been taking enzymes with every meal for quite some time now. The enzyme I use is CREON. It seems to help me a lot with the stomach and intestine pain. As most people will tell you - everyone has different experiences. Do you know which chemo he will be getting and are they starting at 100% dosage verses say 80% ?

Hope other people jump in to give you some more suggestions.