Does sparkling water break a fast?
Usually fine if unsweetened
0 kcal
Yes - fasting-safe. Unsweetened sparkling water does not add calories. Flavored versions should be zero sugar.
Unsweetened sparkling water does not add calories. Flavored versions should be zero sugar.
Unsweetened carbonated water is calorie-free; carbonation itself does not break a fast. Only flavored or sweetened versions add anything.
Base tier: 92/100 for "Fast-safe". Item adjustment: +4 points for calories, nutrient signal, product variability, and safety caution. Final Fast Score: 96/100.
Check the label for calories, sugar, juice, or sweet cream additives.
The Fast Score is an editorial estimate of clean-fast strictness, not medical advice. Goals vary — if you fast for glucose, appetite, or medical reasons, follow your clinician.