what drinks are you allowed on CD. I know your allowed water and coffee and tea but are you not allowed diet coke etc . I am just checking because I don't want to make this mistake so it's best to ask.
I'm told that anything in the CD book is what you can have legally only.
Whether or not coke zero or the like affects you or not varies from person to person and CDC's may have heard other clients try them and be ok - but surely if these drinks were a-ok then they would be in the book?!?