Avoid artificial sweeteners apartame saccharin any of that cancer causing crap anything that says sugar free has cancer stuff in it go for the sugar instead if u must better to avoid it altogether
They do make caffeine free coke too though. But not with real sugar, at least not that I've ever seen.
I would personally just drink a regular coke if you want one... diet soda has a lot of nasty chemicals and being that they both contain caffeine, I'd go with the real stuff :)
Diet coke is never ok. There are proven cases it causes cancer. There are soda drinks that contain cane sugar. Ones that don't have high fructose corn syrup or sugar substitutes. That being said, I'm personally guilty of eating all kinds of bad foods. Foods with high fructose corn syrup, food dyes, caffeine, msg, ect. :(