Does Espresso Break A Fast?

Last Updated on: 6th September 2023, 05:54 pm

Are you an intermittent faster on the quest for optimal health and weight loss?

Picture this: You’re deep into your fasting window, feeling empowered and in control. But suddenly, a tempting aroma wafts through the air – espresso. You wonder, does it break your fast?

In this article, we’ll dive into the evidence to help you make an informed decision. We’ll weigh the pros and cons of indulging in that rich, aromatic cup of coffee during your fasting period.

So grab a seat, and let’s explore together!

Can I Have Espresso While Intermittent Fasting?

Can I have an espresso while intermittent fasting?

The answer is yes. You can still enjoy your favorite cup of espresso while practicing intermittent fasting.

Since espresso is made from coffee beans and water, it contains very few calories and no significant amounts of carbohydrates or protein that would break your fast.

However, it’s important to note that adding milk, cream, sugar, or other sweeteners to your espresso will break your fast as they contain calories and can spike insulin levels.

To stay within the intermittent fasting guidelines, it’s best to drink your espresso black or with a splash of unsweetened almond or coconut milk.

Remember to listen to your body and adjust if you notice any adverse effects on your fasting routine.

Can I Drink Espresso While Fasting?

If you’re fasting, enjoy a nice cup of espresso. Contrary to popular belief, drinking espresso while fasting does not break your fast. Coffee can enhance the benefits of fasting.

Here’s why:

  • Increases metabolism: Espresso contains caffeine, which stimulates your central nervous system and boosts your metabolism.
  • Gives you energy: The caffeine in espresso can provide a much-needed energy boost during fasting.
  • Suppresses appetite: Coffee is an appetite suppressant, helping you feel full and reducing cravings.
  • Curbs hunger pangs: Drinking espresso can help control those hunger pangs that often arise during fasting.

Remember to keep it simple and avoid adding sugar or milk to your espresso, as these additions may spike insulin levels and break your fast.

How Does Espresso Impact Fasting?

Knowing how fasting can impact the results is important if you’re scheduled for bloodwork or a glucose test. Fasting before these tests ensures accurate readings by preventing interference from food and beverages.

For Bloodwork

Espresso doesn’t affect bloodwork during a fast, so you can enjoy your cup without worrying about interference with your blood tests. Here’s why:

  • Caffeine: Espresso contains caffeine, which is quickly absorbed into your bloodstream and can increase alertness and mental focus. Caffeine has been shown to improve cognitive function, boost metabolism, and enhance exercise performance. However, excessive caffeine consumption can lead to jitters, increased heart rate, and disrupted sleep patterns.
  • Fasting: When fasting, your body enters a state of ketosis, relying on stored fat for energy instead of glucose from food. Consuming espresso won’t break your fast because it contains negligible calories and carbohydrates that could disrupt ketosis. Remember to drink water alongside your espresso to stay hydrated during fasting periods.

For Glucose Test

Drinking coffee can affect the accuracy of a glucose test, so it’s best to avoid consuming any before your appointment. Coffee contains caffeine, which has been shown to increase blood sugar levels in some individuals.

When you have a glucose test, it’s important to get accurate results to assess your blood sugar levels properly. Consuming coffee beforehand could skew the results and lead to misinterpretation or incorrect diagnosis.

To ensure the most accurate readings, it is recommended that you refrain from drinking coffee or any caffeinated beverages for at least 8 hours before your glucose test. This will help ensure that your test results are reliable and accurately assess your blood sugar levels.

Pros and Cons of Drinking Espresso During Fasting

One of the pros of having espresso during fasting is that it can provide a quick energy boost. When you’re in the midst of a fast and feeling low on energy, a shot of espresso can give you that much-needed pick-me-up. It contains caffeine, which stimulates your central nervous system and increases alertness. Plus, it has been shown to enhance performance and focus.

Here are some additional benefits to consider:

  • Convenience: Espresso is quick and easy to make or grab on the go, making it a convenient option for those busy mornings.
  • Variety: So many flavors and types of espresso are available, allowing you to customize your drink to suit your preferences.
  • Seasonal specialties: From pumpkin spice to peppermint mocha, espresso offers seasonal flavors that excite your fasting routine.
  • Milk options: Whether you prefer soy or almond milk, espresso can be easily paired with different dairy alternatives.


In conclusion, while espresso contains minimal calories and may not technically break your fast, it can still impact the benefits of fasting.

The caffeine in espresso can suppress appetite and increase alertness, which may benefit some during fasting. However, excessive espresso consumption can disrupt sleep patterns and lead to dehydration.

Interestingly, studies have shown that consuming caffeine before exercising during a fasted state can enhance performance by up to 12%.

It is important to listen to your body and make informed choices about whether or not to include espresso during your fasting window.

Mike Shaw

Mike is a fervent aficionado of all things coffee. His journey has taken him from the verdant coffee farms of South America to the vibrant coffeehouses of Europe and many places in between. Over the years, he's delved deep into the intricate tapestry of coffee, savoring, brewing, and analyzing myriad varieties. For Mike, coffee transcends its role as a morning energizer; it's a world waiting to be explored and cherished.