I have IBS and I am a type 2 diabetic. I no longer drink soda because it upsets my stomach. I've never been a coffee drinker. I turned to Crystal light with caffeine. However I am currently having a bad flare and read that sugar substitutes are not good for IBS, which crystal light contains a sugar substitute. So, my question is...does anyone know what I could do for some caffeine that won't aggrevate my IBS or raise my blood sugar?