I sometimes have a single soda on
a weekend, but never drink more than 1 a week. I recently had a Sprite on
a near empty stomach, and sure enough I have blood in my stool. The stool is your regular brown color, but theres some red "in" it. Like a ribbon of red inside the stool.
When I stay away from soda/coffee, I'm fine. Is this something major? Or is it as easy as, "some people get this when they drink a drink containing acid.