Does sparkling water break a fast?
Plain sparkling water does not break a fast if it has no calories or sweeteners.
Step by step
The longer answer
Plain sparkling water does not break a fast if it has no calories or sweeteners. Carbonation is not the issue; added sugar or calories are. For most intermittent fasting routines, the safest fasting-window drinks are water, plain tea, and black coffee. If your fast is for a medical test or religious purpose, follow those specific rules instead.
Use Fast Goblin notes to mark gray-area choices like sparkling water, then compare hunger and consistency over a few fasts.
Assuming sparkling water is automatically fasting-safe without checking the label or your fasting goal.
Track whether you had sparkling water, the time, hunger level, and whether it made the fast easier or harder.
Educational only. People who are pregnant, breastfeeding, under 18, have diabetes, take glucose-affecting medication, have a history of eating disorders, or feel unwell should speak with a qualified clinician before fasting.
