Look up Zevia Soda, it only uses stevia for a sweetener, no artificial colors, or the ton of other crap. They make all kinds of flavors to mimic different soft drinks. I have one about once a month or so myself when the craving is there for the nostalgia. Otherwise I found sweet drops cola, root beer, etc flavors in water works OK for me.
It’s hard to say definitively that Coke Zero will or won’t hinder “progress”.
On the one hand, I’ve found that many people have a lot more trouble breaking sugar addictions while they’re still eating or drinking foods with artificial sweeteners.
On the other hand, Coke Zero might not hinder your ability to get into ketosis.
In the end, though, Coke Zero is still a very un-nutritious food that mimics sweetness, which ends up causing your brain and body to crave more because you aren’t getting the nutrients out of it that your body expects.
Personally, I suggest people just give it up for at least 30-60 days, at which point they usually don’t want it any more.
I have been on the ketogenic diet for 2 months and have lost 10 pounds. I drink Coke Zero (or Pepsi Zero whichever is available) once a day. I don’t find that it causes me to crave sugar but it does give me he ability to enjoy the carbonation that I would miss by not drinking soda and I still am able to lose weight. Do I wish that I could break the soda habit? Absolutely! As Jeremy stated, there is no nutritional value in drinking the stuff and your just putting unnecessary chemicals into your body.
Coke Zero does not take me out of ketosis. I have experimented many times. However, not everyone’s body react the same.
Also, as other posters have mentioned, Coke zero is definitely not the most healthy for you. I am addicted to the taste and would drop it instantly if I could.