several celsius energy drinks scattered across a bed of ice

Is Celsius Energy Drink Bad for You?

If you've gotta reach for an energy drink, is Celsius your best bet? Here's what experts say.

30-Second Takeaway

After reviewing the science behind the drink’s ingredients and nutritional value, we believe this is a healthier energy drink than most, but, because of its very high caffeine content, not something you want to rely on regularly.

Many of us love energy drinks for the quick energy boost they deliver. However, we know they are, generally speaking, not good for us due to ingredients like artificial sweeteners, artificial flavors, and added sugars (1). One brand that claims to provide a “healthier” energy drink is Celsius, but is it any better than a Red Bull or Monster?

We dove into Celsius’s ingredients and nutritional content to determine whether this drink is good for your health.

Our Experience

Hone Health is a team of health-obsessed journalists, editors, fitness junkies, medical reviewers, and product testers. To ensure we deliver you research-backed information on the Celsius energy drinks, we reviewed several research studies and well-respected medical pages for insight. 


What Is Celsius Energy Drink?

So, what’s the deal with these Celsius drinks? They claim to have a clinically proven formula that can boost your metabolism and help you burn body fat while exercising. But they’re also helpful for just getting you through the workday. 

The brand’s formula contains several healthy ingredients, so you won’t feel super icky. The drinks are also free of artificial preservatives or flavors, aspartame, and high fructose corn syrup. 

That said, let’s break down some of Celsius’s key ingredients. 

Celsius Ingredients

We’re going to break down the key ingredients in a can of Celsius, but first, here’s the full list:

We’re going to break down the key ingredients in a can of Celsius, but first, here’s the full list:

How much caffeine is in Celsius Energy Drink?

A can of Celsius will contain between 100 and 300mg of caffeine, depending on which you grab. That’s a pretty wide range. For reference, an 8-ounce cup of coffee is typically 80 to 100mg of caffeine, meaning the lowest caffeine dose available in a Celsius can is equally or more caffeinated than a cup of coffee (a relatively small one, if we’re being honest with ourselves). 

That’s a lot of caffeine in one drink, but it’s not as high as it sounds initially. The Mayo Clinic suggests healthy adults can safely consume about 400mg of caffeine daily—most Celsius drinks fall on the halfway mark, leaving room for your morning cup of coffee or tea. 

That said, if you’re caffeine-sensitive or fall into one of the groups that should consider a lower daily caffeine intake, Celsius may not be for you.

Key ingredients


Taurine is one of the prominent ingredients featured in these energy drinks. It is an essential amino acid produced in the body and found in several foods and drinks. Taurine can support nerve growth, maintain proper hydration, and produce bile salts, which can help digestion (2). 

Taurine may improve heart function, prevent heart disease, manage diabetes, and increase exercise performance (2).

It’s challenging to assess the safety of taurine, as adverse reactions to it are more often studied as a group with other ingredients in energy drinks—guarana seed extract, different sweeteners, ginseng, caffeine, and so on (2).

Guarana extract 

Guarana is an extract of seeds from the plant Paullinia cupana from the Amazon Basin. It contains components like caffeine, theophylline, and theobromine—all alkaloids that can affect the central nervous system (3). Guarana extract is also a stimulant and tonic that can treat fatigue and decrease appetite and thirst (3).

Several research studies have found that guarana has several benefits, such as improving energy, promoting weight loss, and relieving pain. (3, 4, 5). 

If you consume too much guarana extract (loosely defined as more than 1000mg daily), you may be at risk of symptoms like tremors, jitteriness, agitation, confusion, hypertension, and dehydration (3). But it should be noted that researched daily dose has ranged from 200 to 1000mg, which is a significant gap.


Ginger extract 

Ginger extract is another natural ingredient that stands out in this beverage. It is a plant-based spice derived from the root of the Zingiber officinale plant. The spice contains anti-inflammatory properties that may improve your health (6). 

Some benefits of ginger root extract include soothing your digestive system, protecting your immune system, and even preventing certain chronic diseases, such as hypertension and congenital heart disease (CHD) (6).

Ginger root extract is safe to consume in moderate amounts, but high doses may increase the risk of bleeding (7), most notably in people already taking blood thinners.

Green tea leaf extract 

The green tea leaf extract is derived from the Camellia sinensis plant (8). It contains several polyphenols, which are plant compounds with antioxidant properties, which are beneficial for your health in numerous ways (9). 

Research shows that consuming green tea leaf extract may lower blood cholesterol levels, reduce blood pressure, protect the immune system, improve oral health, reduce inflammation, and might even lower the risk of certain cancers (10). 

Because green tea extract contains caffeine, it can cause unpleasant symptoms like anxiety, tremors, irritability, or sleeping difficulties. Yet, you’re more likely to experience these if you’re sensitive to caffeine or take green tea in high doses (8). 

Celsius Nutritional Value

We’ll break down the key nutritional info in a can of Celsius, but first, here’s the full nutritional value in each can: 

Key nutritional info

Vitamin B6 

A 12-fluid-ounce Celsius energy drink contains 2 milligrams of vitamin B6 with a 120% daily value. Daily value, or DV, is how much nutrient is within a single serving of a food or drink (11). You’ll get a nice dose of this essential vitamin in this drink, as you only need around 1.3 milligrams daily (12). 

Vitamin B6 is a water-soluble vitamin naturally present or added to foods or taken as a dietary supplement. This nutrient is responsible for performing a variety of functions in the body, such as metabolizing amino acids and carbohydrates, creating blood cells, and maintaining cell health (12). 

Due it contains antioxidant and anti-inflammatory properties, vitamin B6 provides several health benefits, which include the following (13):

Vitamin B12 

Like vitamin B6, the Celsius energy drink contains a large amount of vitamin B12 at 6 micrograms, which equals 250 percent DV. Vitamin B12 is a water-soluble vitamin found in certain foods and as a dietary supplement. The nutrient is responsible for maintaining the development and function of the central nervous system, forming healthy red blood cells, and facilitating DNA synthesis (14).

Vitamin B12 may improve brain function and boost your energy levels (15).

If you take the vitamin in average doses, you may be safe from unwanted side effects. However, higher doses of vitamin B12 may lead to symptoms like headaches, fatigue, nausea, vomiting, diarrhea, and tingling in the hands and feet. Daily recommended intake is just 2.4mcg, but higher levels of consumption have been found to be safe. That said, most of the potential negative side effects should only emerge when supplementing B12 for severe B12 deficiency (16). 

Vitamin C 

Good ol’ vitamin C is another distinct nutrient, with each Celsius drink containing 60mg or 70 percent of daily value. You’re likely familiar with vitamin C, but if you’ve forgotten, it is an essential nutrient found in various foods and offered as a supplement. It is an antioxidant that can protect your body from free radicals, which can play a role in developing chronic diseases like heart disease and cancer (17). 

Vitamin C can aid in wound healing and scar tissue formation, repair and maintain cartilage, bones, and teeth, and help with iron absorption (18).


Chromium is one of the ingredients that truly makes Celsius energy drinks unique. One drink contains 50mcg or 140 percent DV of chromium. Like all other nutrients, it is naturally present in foods and as a dietary supplement. Chromium might be responsible for metabolizing carbohydrates, lipids, and proteins to initiate insulin activity, but there’s a need for additional research to confirm (19).

Some supposed benefits of chromium include promoting healthy blood glucose and blood pressure levels, improving lean body mass by suppressing appetite, and increasing energy levels (20). 

The Bottom Line

After reviewing the ingredients and nutritional value of Celsius drinks, we think it’s safe to say that these are some of the “healthier” energy drinks on the market. Their unique formula can boost energy levels and may improve overall health. When it comes to any energy drink it is important to be mindful of unwanted side effects and always consult with your medical provider if needed.

  1. UC Davis Department of Nutrition. () Nutrition & Health Info Sheets for Consumers – Energy Drinks
  2. Cleveland Clinic (2023)
  3. National Library of Medicine (2023)
  4. Bortolin, R.C. et al (2019)
  5. Santana, A.L. et al (2018)
  6. Modi, M. et al (2022)
  7. Johns Hopkins Medicine. () Ginger benefits.
  8. University of Rochester Medical Center. () Green tea extract.
  9. Rana, M. et al (2022)
  10. Reygaert, W.C. et al (2017)
  11. U.S. Food and Drug Administration (FDA) (2023)
  12. National Institutes of Health Office of Dietary Supplements (NIH) (2023)
  13. Cleveland Clinic (2022)
  14. National Institutes of Health Office of Dietary Supplements (NIH) (2023)
  15. Cleveland Clinic (2022)
  16. Mayo Clinic (2023)
  17. Mayo Clinic. (2023)
  18. MedlinePlus (2023)
  19. National Institutes of Health Office of Dietary Supplements (NIH) (2022)
  20. Swaroop, A. et al (2019)