Sorry if I find it hard to trust someone whose advice regarding any soft drink is “drink away”!
benning chace

To quote myself, from the article directly above:

“ Water may always be the healthiest choice, but they come a close second. The artificial sweeteners we use have been tested more than almost any other product that you’ll come in contact with in your life.”

Ultimately water is healthiest, but you aren’t doing much damage by drinking diet drinks, if any.