Does Celsius Break A Fast? The Truth About Drinking Celsius During Fasting

by Author
Does Celsius Break A Fast

Intermittent fasting has become increasingly popular in recent years as a way to lose weight, improve overall health, and increase longevity. One of the most common questions that arise when it comes to fasting is what can be consumed during the fasting period without breaking the fast. Celsius, the popular energy drink, has been a topic of debate among the fasting community. Some believe that drinking Celsius during the fasting window can break the fast, while others argue that it can actually enhance the benefits of fasting. In this article, we will explore the truth about Celsius and fasting, and whether or not it can truly break your fast. So, if you’re a fan of Celsius and intermittent fasting, keep reading to find out what the experts say about this controversial topic.

Does Celsius Break A Fast?

Intermittent fasting is a pattern of eating where you alternate between periods of eating and periods of fasting. Celsius, a popular energy drink, can break a fast depending on the type of fast you’re doing and what your goals are. If you’re fasting for weight loss purposes, it’s best to avoid consuming Celsius during your fasting period, but if you’re fasting for other reasons, consuming Celsius in moderation may not necessarily break your fast. It’s important to consult with a healthcare professional before starting any new diet or fasting regimen.

What Is Celsius And How Does It Work?

Celsius is a popular energy drink that is marketed as a fitness and weight loss aid. It contains a blend of ingredients that are said to enhance metabolism and increase energy levels. These ingredients include caffeine, taurine, guarana extract, green tea extract, and ginger extract. Celsius is also sugar-free and contains no artificial preservatives, making it a popular choice among those who are health-conscious.

The way Celsius works is by stimulating the body’s metabolism and thermogenesis, which is the process by which the body generates heat and burns calories. This means that when you consume Celsius, your body is working harder to burn calories and produce energy, which can lead to weight loss and increased energy levels.

The Benefits Of Fasting

Before we dive into whether or not Celsius can break your fast, let’s first explore the benefits of fasting. Fasting is an ancient practice that has been used for centuries for various health reasons. Some of the benefits of fasting include:

  • Weight loss: When you fast, your body enters a state of ketosis, which means that it is burning fat for energy instead of glucose. This can lead to significant weight loss over time.
  • Improved insulin sensitivity: Fasting has been shown to improve insulin sensitivity, which can help prevent Type 2 diabetes.
  • Increased longevity: Fasting has been shown to increase longevity in animals and may have similar effects in humans.
  • Improved cognitive function: Fasting has been shown to improve cognitive function and may even help prevent neurodegenerative diseases like Alzheimer’s.
  • Reduced inflammation: Fasting has been shown to reduce inflammation in the body, which can help prevent chronic diseases like heart disease and cancer.

What Breaks A Fast?

Now that we’ve discussed the benefits of fasting, let’s talk about what actually breaks a fast. The general consensus among experts is that anything that contains calories will break a fast. This means that consuming food, beverages, or supplements that contain calories will end your fast and break the metabolic state of ketosis.

However, there are some exceptions to this rule. For example, consuming small amounts of certain supplements like BCAAs (branch chain amino acids) or MCT oil may not break a fast since they are metabolized differently than food and do not raise insulin levels.

The Science Behind Celsius And Fasting

So, where does Celsius fit into this equation? Does it break a fast or not? The answer is not straightforward, as it depends on how you define “breaking a fast.”

Celsius contains caffeine, which is a stimulant that can increase metabolism and energy levels. While caffeine itself does not contain calories, it can stimulate the liver to release glucose into the bloodstream, which can raise insulin levels and break ketosis.

In addition to caffeine, Celsius also contains other ingredients like taurine and guarana extract, which can also stimulate the release of glucose and insulin. This means that consuming Celsius during a fast may technically break the metabolic state of ketosis and end your fast.

However, some argue that the benefits of Celsius may outweigh the potential drawbacks. For example, if you consume Celsius before a workout, it may enhance your performance and help you burn more calories. Additionally, the caffeine in Celsius may help suppress appetite, making it easier to stick to your fasting plan.

Specialist Opinions On Fasting And Celsius

The case against Celsius during fasting

Many experts argue that consuming Celsius during a fast is not advisable. As mentioned earlier, the ingredients in Celsius can stimulate the release of glucose and insulin, which breaks ketosis and ends the fast. This can have negative effects on blood sugar levels and hinder weight loss goals.

Furthermore, some people may be sensitive to caffeine and experience adverse effects like jitters, anxiety, or insomnia when consuming Celsius. These side effects can disrupt sleep patterns and affect overall health and well-being.

The potential benefits of Celsius during fasting

On the other hand, some experts believe that Celsius may have benefits when consumed during a fast. For example, the caffeine in Celsius can increase mental focus and energy levels, which may be helpful during a workout or while working on a project.

Additionally, some studies suggest that caffeine can enhance fat burning and improve metabolic rate. This means that consuming Celsius before exercise may help burn more calories and promote weight loss.

Finding balance with Celsius and fasting

Ultimately, the decision to consume Celsius during a fast will depend on individual goals and preferences. It may be helpful to experiment with different fasting methods and monitor how the body responds to Celsius.

For those who are sensitive to caffeine or have trouble sleeping, it may be best to avoid Celsius altogether during fasting periods. However, for others who find it beneficial for energy and focus, consuming Celsius in moderation may be a viable option.

Alternatives to Celsius during fasting

If you choose not to consume Celsius during a fast, there are other options available that can provide similar benefits. For example, drinking black coffee or green tea can also increase metabolism and provide energy without breaking ketosis.

Additionally, staying hydrated with water and electrolyte-rich beverages like coconut water can help maintain energy levels and support overall health during a fast.

Consultation with healthcare professionals

It is always important to consult with healthcare professionals before starting any new diet or supplement regimen. This is especially true for individuals with pre-existing medical conditions or those who are taking medication. A healthcare provider can provide personalized recommendations and help determine if Celsius is safe and appropriate for an individual’s specific needs and health status.

Overall, while Celsius may have potential benefits during a fast, it is important to approach its consumption with caution and mindfulness. By finding balance and listening to the body’s needs, individuals can optimize their fasting experience and achieve their health goals.

Alternatives To Celsius During Fasting

  1. Black coffee: Like Celsius, black coffee also contains caffeine which can help increase metabolism and provide energy during a fast. It is important to note that adding sugar, cream or other additives will break the fast.
  2. Green tea: Green tea contains a compound called epigallocatechin gallate (EGCG) which may help boost metabolism and aid in weight loss. It also contains caffeine, but in smaller amounts than coffee or Celsius.
  3. Water: Staying hydrated with water is important during a fast as it helps maintain energy levels and supports overall health. Adding lemon or cucumber slices can add flavor without breaking the fast.
  4. Coconut water: Coconut water is a natural source of electrolytes that can help maintain hydration and energy levels during fasting periods. However, it is important to choose brands that do not contain added sugars or flavors.
  5. Herbal tea: Herbal teas like peppermint or chamomile can provide a soothing effect on the body and mind during fasting periods, without adding calories or breaking the fast. They can also help with digestion and promote relaxation, which can be beneficial during a fast. 

However, it is important to choose teas that do not contain caffeine or other stimulants that may affect the fasting process.


Celsius is a drink that does not contain calories but does contain ingredients like caffeine that can stimulate the release of glucose and insulin, potentially breaking the metabolic state of ketosis. If you are strict about maintaining a fasting state and want to stay in ketosis, it’s best to stick to water, black coffee, or tea during the fasting window. However, if you are looking for a way to enhance your energy levels and performance during a workout, Celsius may be a good option. The most important thing is to listen to your body and do what works best for you. If Celsius makes you feel energized and focused, then go for it, but if it interferes with your fasting goals or makes you feel jittery or anxious, then it’s best to avoid it.

Related Posts