Updated at: 24-06-2023 - By: John Lau

Intermittent fasting has gained immense popularity in recent years, with people exploring various energy-boosting options to help them through the day. One such option is Celsius, an energy drink with zero sugars and no artificial ingredients.

But does consuming a Celsius break your fast and hinder the benefits of intermittent fasting?

In this blog post, we’ll delve into different fasting protocols, examine the ingredients of Celsius drinks, and determine whether or not they can affect your fasting state.

Understanding Intermittent Fasting

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Intermittent fasting involves alternating periods of eating and fasting, with the goal of improving health outcomes such as weight loss, insulin sensitivity, and autophagy.

Different Types Of Fasting Protocols

Understanding intermittent fasting is crucial for anyone looking to embark on this dietary journey, especially if you’re dealing with alcoholism and need extra support in maintaining a healthy lifestyle. Below are the different types of fasting protocols that can be followed:

  1. Time-Restricted Feeding: This approach involves restricting your eating window to a specific number of hours each day, usually 8-12 hours, while fasting for the remaining time. It helps maintain hormonal balance and promotes better metabolism.
  2. Alternate-Day Fasting: This method requires alternating between days of complete fasting (consuming only water or other non-caloric beverages) and days of regular eating. It may aid in weight loss and overall health improvement.
  3. The 24-Hour Fast: This type of fasting entails abstaining from food entirely for a full 24-hour period, 1-2 times per week. It supports glucose control and fat loss by allowing your body to focus on burning stored energy instead of constantly processing new food intake.
  4. The 5:2 Diet: In this protocol, you consume a reduced-calorie diet (500 calories for women and 600 calories for men) on two non-consecutive days per week while eating normally the other five days. This method can encourage weight loss without feeling overly restrictive.
  5. Modified Fasts: These involve partial caloric restriction on specific fasting days rather than total calorie abstinence, similar to the 5:2 diet or the Fast-Mimicking Diet plan which is designed to mimic the benefits of traditional fasting.

What Breaks A Fast?

Understanding what breaks a fast is essential for those who are following intermittent fasting protocols, especially for people recovering from alcoholism, as maintaining strict adherence to their fasting regimen can help improve overall health.

A commonly agreed-upon rule amongst experts on intermittent fasting is that consumption of any amount of calories will break a fast.

As individuals recovering from alcoholism work towards improving their lifestyle and building healthier habits through practices like intermittent fasting and decreasing caloric intake, it’s crucial to recognize which food or drink items can potentially break a fast.

Pre-workout energy drinks such as Celsius contain calories that may interfere with the intended benefits of intermittent fasting.

Celsius And Fasting: Debunking The Controversy

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Let’s delve further into the debate surrounding Celsius and fasting, examining its ingredients to determine whether it can truly break a fast or not.

Examining The Ingredients In Celsius

It is essential to examine the ingredients in Celsius, a popular low-calorie energy drink widely used before workouts due to its energizing effects.

One of the primary concerns relating to fasting revolves around whether consuming specific beverages will break the fast or cause insulin spikes that could interfere with weight loss goals.

Can Celsius Spike Insulin Levels?

Consuming Celsius while fasting may potentially lead to spikes in insulin levels due to its high caffeine content. Insulin is a hormone that regulates blood glucose levels and can cause temporary highs and lows in blood sugar levels.

When we eat or drink, our bodies release insulin to help transport nutrients into our cells for energy production.

However, when consuming certain beverages like Celsius with high caffeine content without food, it could trigger a rapid response of insulin secretion that may reduce the body’s ability to burn fats and instead increase glucose uptake by the liver.

Does Celsius Contain Calories That Can Break A Fast?

Celsius energy drinks contain 10 calories, which can potentially break a fast. However, compared to other pre-workout supplements and energy drinks on the market, Celsius is considered a low-calorie option that’s ideal for those following intermittent fasting protocols.

It’s essential to consume Celsius after at least 12 hours of fasting to avoid insulin spikes that can lead to temporary highs and lows. With no sugar or preservatives added, Celsius contains only natural flavors making it one of the healthier options among energy drinks.

Benefits And Drawbacks Of Drinking Celsius During Fasting

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Drinking Celsius during fasting can improve energy and focus, but may interfere with autophagy and ketosis; discover the benefits and drawbacks of consuming this low-calorie energy drink in more detail.

Improved Energy And Focus

Celsius can be a great pick-me-up for those looking to improve their energy and focus during fasting. With its 200mg of caffeine, the drink can give you the boost you need to power through your day without breaking your fast.

Plus, Celsius is sugar-free, making it an even better option for anyone watching their caloric intake while trying to maintain ketosis during intermittent fasting.

Many users have reported feeling more alert and focused after drinking Celsius, making it a popular choice among students and professionals alike.

Potential Interference With Autophagy And Ketosis

Drinking Celsius Sparkling Fitness Drink while fasting can potentially interfere with autophagy and ketosis. Autophagy is the body’s way of recycling damaged cells and cellular components, which is triggered during fasting.

Drinking a calorie-containing drink like Celsius can prevent autophagy from occurring, as it can spike insulin levels and inhibit fat burning.

Ketosis also plays a crucial role in intermittent fasting, allowing the body to burn fat for energy instead of glucose.

However, not all types of fasts have strict rules regarding calorie intake. Some allow for minimal caloric intake or even incorporate small meals throughout the day. In these cases, drinking Celsius may not necessarily break the fast or interfere with autophagy and ketosis significantly.

The Role Of Personal Preference In Determining Whether To Consume Celsius During A Fast

Ultimately, the decision to drink Celsius energy drinks during fasting is a matter of personal preference and depends on individual fasting goals. Some people may prefer to abstain completely from consuming any calories or carbohydrates while fasting in order to adhere strictly to their protocol.

For example, if someone’s aim for intermittent fasting is weight loss, they might choose not to consume Celsius during their fast because it contains calories that can break the fast.

However, if someone’s primary goal is improved productivity throughout the day alongside other benefits like feeling energized without having coffee or sugar crashes then they might opt-in for Celsius during a fast as it provides great energy perks through its caffeine contents.

Alternatives To Celsius For Fasting

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If you’re hesitant about consuming Celsius during fasting, there are plenty of other options to consider such as other energy drinks or non-caloric beverages like water – keep reading to find out more!

Other Energy Drinks To Consider

If Celsius is not the right fit for your fasting routine, there are several other energy drinks that you can try to help you power through your fast while staying within your calorie and carb limits. Here are some alternatives worth exploring:

  1. XS Energy Drink: This zero-calorie energy drink contains caffeine and B-vitamins but does not contain any sugars or carbs that would break your fast.
  2. Monster Ultra: The Ultra line of Monster energy drinks has zero calories, zero sugar, and zero carbs, making them ideal for intermittent fasting.
  3. Reign Total Body Fuel: With only 10 calories, zero sugar, and no artificial flavors or colors, Reign Total Body Fuel is another good option for an energy boost without breaking your fast.
  4. Rockstar Pure Zero: Rockstar’s Pure Zero line boasts low calories and a blend of caffeine and natural ingredients like ginseng and guarana to help keep you alert during fasting periods.
  5. Red Bull Sugarfree: For those who enjoy the taste of Red Bull but want to avoid the added sugars, Red Bull Sugarfree is a great alternative with just 5 calories per can.

Water And Other Non-caloric Beverages

If you’re looking for a safe and calorie-free drink option while fasting, look no further than water. Purified water is an excellent choice as it contains no calories or macronutrients such as protein, fat, or carbohydrates that could break your fast.

In addition to purified water, there are other non-caloric beverage options available that won’t disrupt the weight loss process during fasting periods. Some of these alternatives include black coffee, green tea, and herbal teas.

These drinks can help suppress hunger cravings and provide a boost in energy levels without adding calories to your diet.


In conclusion, the debate on whether Celsius breaks a fast depends mainly on the type of fasting protocol being followed and individual preferences.

While Celsius contains only ten calories and no sugars or artificial ingredients, it is advisable to avoid consuming it during fasting periods as it can interfere with autophagy and ketosis.

Other non-caloric beverages such as water or herbal tea can be excellent alternatives for hydration purposes while fasting.

However, if you must consume an energy drink while fasted, consulting your healthcare professional or nutritionist about the usage of Celsius could give you useful insights into deciding if it’s right for your fasting protocol.