Yes, plain, unsweetened sparkling water is generally OK for intermittent fasting that permits zero-calorie drinks. The useful distinction is what is in the drink, rather than whether it has bubbles. Added sugar, juice, and other calorie-containing ingredients change the answer.
Can I drink Waterloo while fasting?
Waterloo describes its sparkling waters as purified carbonated water with natural flavors and no sugar or sweeteners in its official FAQ. Its Lemon Lime product page also lists zero calories. Check the label on the specific can you are drinking.
Johns Hopkins Medicine allows water and zero-calorie drinks during intermittent fasting. Based on that guidance and Waterloo’s product information, Waterloo sparkling water generally fits that kind of fast. This is an inference, not a clinical study of Waterloo during fasting.
Does Waterloo break a fast?
For a routine dietary fast that allows zero-calorie beverages, you generally do not need to restart your timer after drinking Waterloo sparkling water on its own. Adding juice, syrup, or alcohol changes the drink and ends a calorie-free fasting interval.
A zero-calorie label does not establish what happens to your insulin or autophagy. Neither a beverage label nor a fasting timer measures these processes, so claims that Waterloo guarantees uninterrupted autophagy go beyond the evidence cited here.
How to check any sparkling-water label
- Check calories and serving size. Read the amount for the quantity you will drink.
- Check ingredients. Look for added sugar, juice, honey, or other calorie-containing ingredients.
- Check what you add. A zero-calorie base does not make a mixed drink calorie-free.
- Check your fasting rules. A medical procedure or religious observance may have requirements beyond avoiding calories.
When should I follow different rules?
For a blood test, surgery, or other procedure, follow the instructions from your medical team, including which liquids are allowed and when to stop drinking. For religious fasting, follow the rules of your observance. General intermittent-fasting advice does not override either.
Track the window, not a promised biological effect
Use our free fasting-window guide to work out start and end times. The live fasting timer counts elapsed time without a subscription; it cannot confirm ketosis or autophagy.
Frequently asked questions
Is sparkling water OK for intermittent fasting?
Plain, unsweetened, zero-calorie sparkling water generally fits an intermittent-fasting routine that allows calorie-free drinks. Check flavored varieties for sugar, juice, or other calorie-containing additions.
Can I drink Waterloo while fasting?
Waterloo sparkling water generally fits ordinary intermittent fasting because it is labeled zero calories and contains no sugar or sweeteners. Check your can and drink it without calorie-containing mixers. Medical and religious fasts may have different rules.
Does Waterloo break a fast?
For a dietary fast that allows zero-calorie drinks, Waterloo sparkling water generally does not break the fast. That is an interpretation of its label and general fasting guidance, not evidence that it has no effect on insulin or autophagy.
Does flavored sparkling water break a fast?
Flavor alone does not tell you. Read the nutrition and ingredient labels: unsweetened zero-calorie varieties generally fit ordinary intermittent fasting, while added juice, sugar, or other calories end a calorie-free fasting interval.