Where does caffeine stand on the Carb Nite solution? I see some people recommend coffee in the morning as an appetite suppressant and other people recommend starting your CN with some coffee. I however pretty much ingest caffeine all day in the form of Coke Zero. I usually end up drinking about a liter every day. I know soda itself is just a horrible habit, but I feel I'm addicted to it. I've tried to kick it before. I'll stop drinking it for a week but I always find myself pounding one down before too long. Is this a complete no-no on CNS? I've been drinking it during my recalibration phrase. It has no calories or carbs, but lots of fake sugars. Did I ruin my recalibration phrase? What is the CNS stance on caffeine and diet soda in particular? Again, I just want to make sure I'm doing this right.