What drinks can you have while fasting?

Water, plain sparkling water, plain black coffee, and unsweetened herbal, green, or black tea are the most commonly accepted drinks during a fasting window. These beverages are generally acceptable because they contain zero or negligible calories and do not typically trigger an insulin response. It is important to note that adding milk, sugar, or flavorings introduces calories and will break a strict fast. You can refer to the master drinks table above for a quick overview of what is generally acceptable.

Can I have 0 calorie drinks when fasting?

Yes, most zero-calorie drinks are generally considered acceptable during intermittent fasting. The reasoning is that without calories, these drinks do not trigger a significant insulin response, allowing your body to remain in a fasting state. However, there is some debate regarding artificial sweeteners found in diet sodas; some people find they may affect hunger signals or insulin levels. Many people choose to stick to naturally zero-calorie options like plain water or black tea to keep things simple.

Does black coffee break a fast?

Plain black coffee is generally considered not to break a strict fast ( 5 ). It contains negligible calories and minimal macronutrients, meaning it does not typically provoke an insulin response. The important caveat is that adding milk, cream, sugar, or syrups will introduce calories and break the fast. For those practicing fasting specifically for autophagy, some practitioners prefer to avoid all non-water drinks, but for general intermittent fasting, black coffee is widely used.

Can you drink sparkling water while fasting?

Yes, plain sparkling water does not break a fast. It is completely calorie-free and offers a refreshing alternative to flat water. Flavored sparkling water is acceptable only if it contains no calories, sugars, or artificial sweeteners. The carbonation itself does not affect the fasting state, making it a great choice to help you stay hydrated and manage hunger during your fasting window.

What happens if you drink something other than water while fasting?

It depends on what you drink. Zero-calorie drinks like black coffee or unsweetened tea generally do not break a fast and can be consumed freely. Caloric drinks, such as juice, soda, or milk, will break the fast and restart your digestive processes and insulin response. Fasting styles range from strict water-only fasting to more flexible intermittent fasting protocols, so the impact of what you drink depends on the specific rules of the routine you are following. Disclaimer: Every fast is a personal experience. Your dietary preferences, body composition, and activity level all influence your fasting experience. It’s advisable to speak with a healthcare provider before making significant changes to your eating or drinking routine.