Does mineral water break a fast?
Quick answer
Plain mineral water does not break a fast.
Step by step
01 Decide if your fast is strict, practical, medical, or religious.
02 Check whether mineral water contains calories, sugar, protein, fat, or sweeteners.
03 If unsure, keep the fasting window simple and move mineral water to your eating window.
The longer answer
Plain mineral water does not break a fast. It has no meaningful calories and can help hydration. 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.
Tip
Use Fast Goblin notes to mark gray-area choices like mineral water, then compare hunger and consistency over a few fasts.
Common mistake
Assuming mineral water is automatically fasting-safe without checking the label or your fasting goal.
Track in the app
Track whether you had mineral water, the time, hunger level, and whether it made the fast easier or harder.
Safety note
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.
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.
