Diet Soda on Keto: Does It Break Ketosis?
Short version: a can of diet cola has essentially no carbohydrate and no sugar, so it will not knock you out of ketosis, and plenty of people drink it happily on keto. Whether it is a good idea for you personally is a slightly longer conversation, because the worries about diet soda are less about carbs and more about sweeteners, cravings and habit. Here is what actually holds up and what does not, so you can make your own call rather than follow either the “totally fine” or the “poison” camp.