Here is an interesting article about caffeine and it's effects. The section on Gastritis applies to WLS folks, so you may want to wait a bit before hitting the coffee, tea or other caffeinated beverages.

http://shine.yahoo.com/healthy-living/five-scariest-things-caffeine-does-body-215400917.html

Interesting article.

I had to laugh though as I noticed that the author says that she now drinks "only" three cups per day in order to be safe (except during fashion week, which is obvi a hectic time for all of us! lol).

Thanks for sharing this.