Sprite Zero, Coke Zero…all those “zero calorie” drinks, do they break a fast?
I don’t notice a difference but some people swear it’ll break your fast.
The answer depends on why you’re doing the fast. If you’re fasting for autophagy, gut health, etc., then yes zero calorie drinks will likely break a fast. Artificial sweeteners (even though they’re 0 calories) can still stimulate an insulin response, which would theoretically interrupt autophagy and break the fast.
If you’re fasting only for weight loss, it’s probably fine.
I can tell you from first hand experience that they wont break ketosis. As far as breaking a fast…even if they did. You would be right back in the fast in less than 10 mins. There is almost nothing for the body to process.