Exactly what I'm talking about, just didn't want to name it by name as people have a lot of preconceived notions about it that pops up as soon as you say "snus", for some reason.

I never heard about it causing GI problems, but snus definitely causes major teeth and gum problems. The guy I mentioned had his gums receded completely, he once showed it to me. It was very bizarre.

Also see this other comment on this thread about this issue:

https://news.ycombinator.com/item?id=48411778