Is Diet Coke still bad for you?

One diet Coke a day is probably okay as long as you don't consume a lot of other artificial sweeteners.  More than one would be considered bad. 

Yeah, that's not ever going to change unless the formula is completely revamped to get rid of all the artificial ingredients.

Yes, my doctor and I spoke the other day, I asked him this question and he told me even though it has no sugar, it had acid and chemicals that are still bad for you so it’s best to avoid that as well.