I know I was told that I shouldn't have chewing gum as
a) The chewing action stimulates gastric juices and appetite
b) If you swallow it accidentally, then it can block up your new pouch..
b) Actually happened to me, it meant an endoscopy and a lot of embarrassment and discomfort.
I must admit though, that I do still chew gum albeit very carefully, and would find it hard to go without it, as I have chewed gum ever since I gave up the cigarettes back in February 2012.