Hi
I do have coke Zero and have done since week 1. ( I am now starting week4)
My CDC stated any Zero calorie drink that does not contain CITRIC ACID is okay. Diet coke contains this.
I sip one or two cans/bottles a day, especially when I feel the need for something to eat.
It hasn't done my weight loss any harm, but see what your CDC says.
Its confusing when there is so much conflicting information, I agree.