Celsius is a popular fitness drink, and many people wonder if it actually helps with weight loss. The short answer is that Celsius contains ingredients with some evidence for boosting metabolism, but the drink itself is not a weight loss solution. Research shows the effects are modest, and the drink’s effectiveness depends on how you use it within a larger weight management plan.
What Is Celsius and What Is In It?
Celsius is a carbonated beverage marketed as a “fitness drink.” It contains caffeine, green tea extract, ginger, and several B vitamins. Some varieties also include added taurine and guarana seed extract.
The company claims the drink can boost metabolism and help you burn more calories. These claims are based on a specific blend of ingredients called MetaPlus, which includes green tea extract, caffeine, and ginger.
Most Celsius drinks contain 200 mg of caffeine per can. That is roughly the same as two cups of coffee. The sugar-free versions use sucralose or stevia as sweeteners.
Does Celsius Help You Lose Weight? What Research Says
Research on Celsius specifically is limited. The company has funded several small studies on its product, which is an important detail to consider. Independent research on the exact blend is scarce.
One small study published in the Journal of Strength and Conditioning Research examined the effects of Celsius on energy expenditure. The study found that drinking Celsius increased calorie burn for a few hours after consumption. However, the effect was modest and short-lived.
Other studies on the individual ingredients suggest they may have small metabolic effects. Green tea extract and caffeine have both been studied for their potential to increase energy expenditure. The combined effect of these ingredients is real but small.
The key point is that burning a few extra calories per hour is not the same as meaningful weight loss. Weight loss requires a sustained calorie deficit over weeks and months.
How Caffeine and Green Tea Affect Metabolism
Caffeine is a stimulant that increases energy expenditure and fat oxidation. It works by blocking adenosine receptors in the brain, which reduces fatigue and increases alertness. This effect also raises your metabolic rate slightly.
Green tea extract contains catechins, particularly epigallocatechin gallate (EGCG). Some research suggests that catechins combined with caffeine can increase calorie burning more than caffeine alone. The effect is thought to come from EGCG inhibiting an enzyme that breaks down norepinephrine, a hormone involved in fat burning.
These effects are well documented. However, the magnitude matters. Most studies show that caffeine and green tea combinations increase energy expenditure by roughly 50 to 100 calories per day. That is not enough to produce significant weight loss on its own.
Your body also builds tolerance to caffeine over time. Regular drinkers may experience a smaller metabolic boost than occasional users.
Can Celsius Replace a Healthy Diet and Exercise?
No. No drink can replace the fundamentals of weight management. A calorie deficit remains the primary driver of weight loss.
Celsius might help in small ways. If you drink it before exercise, the caffeine can improve focus and endurance. This could help you work out harder or longer, which indirectly supports weight loss.
Some people also use Celsius as a replacement for sugary sodas or energy drinks. Choosing a zero-calorie drink over a 150-calorie soda creates a meaningful calorie reduction over time.
But drinking Celsius while eating a poor diet or skipping exercise will not lead to weight loss. The metabolic boost is too small to overcome a large calorie surplus.
What the Evidence Does Not Show
No large, long-term human trials have confirmed that Celsius produces sustained weight loss. The studies that exist are small, short-term, and mostly funded by the company that makes the product.
Independent research on the exact MetaPlus blend is lacking. We know a lot about the individual ingredients, but not about how they perform together over many months in real-world conditions.
Some marketing claims suggest Celsius can “transform” your metabolism or produce dramatic results. No study has confirmed these claims. The evidence points to a small, temporary increase in calorie burning, not a fundamental change in how your body processes energy.
Weight loss products often rely on this gap between biological plausibility and demonstrated results. The ingredients in Celsius do have metabolic effects. Whether those effects translate to meaningful weight loss over time is not well established.
Is Celsius Safe to Drink Regularly?
For most healthy adults, Celsius is likely safe in moderation. The main concern is caffeine intake.
Health authorities generally consider up to 400 mg of caffeine per day safe for most adults. One can of Celsius contains 200 mg, so two cans would put you at that limit. Adding coffee, tea, or other caffeinated products could push you over.
Common side effects of excess caffeine include:
- Jitteriness and anxiety
- Sleep disruption
- Increased heart rate
- Digestive discomfort
People with heart conditions, high blood pressure, or anxiety disorders should be cautious with high-caffeine drinks. Pregnant women are generally advised to limit caffeine to 200 mg per day. No clinical guidelines specifically address Celsius use during pregnancy.
The sweeteners used in Celsius are approved food additives. Sucralose and stevia are generally recognized as safe by regulatory agencies. Some research raises questions about long-term effects of artificial sweeteners on gut bacteria, but the evidence is not conclusive.
Practical Considerations for Using Celsius
If you choose to drink Celsius, timing matters. The caffeine content means it is best consumed earlier in the day. Drinking it late in the afternoon could interfere with sleep, and poor sleep is linked to weight gain.
Using Celsius before exercise is the most evidence-based approach. The caffeine can improve athletic performance, which may help you get more from your workouts.
Be mindful of total caffeine intake across all sources. A can of Celsius plus a few cups of coffee can easily exceed recommended limits.
If you are sensitive to caffeine, start with half a can to see how your body responds. Some people experience significant jitteriness or heart palpitations from 200 mg of caffeine, especially if they do not regularly consume caffeine.
Alternatives That Have Stronger Evidence
If you want to support weight loss through what you drink, the evidence is clearer for other options.
Water is the most obvious choice. Staying hydrated supports normal metabolism and can help control appetite. Replacing sugary drinks with water creates a reliable calorie deficit.
Plain coffee and unsweetened tea provide caffeine and antioxidants without added ingredients. They are cheaper than fitness drinks and have similar metabolic effects.
Green tea specifically has more research behind it than most commercial fitness drinks. The evidence is still modest, but it is consistent and comes from independent studies.
The most effective approach remains a balanced diet with adequate protein and fiber, regular physical activity, and sufficient sleep. These factors have strong, consistent evidence for weight management. No beverage can match their impact.
Frequently Asked Questions
How many calories does Celsius burn?
Studies show a small increase in calorie burning for a few hours after drinking Celsius, likely under 100 extra calories per day. This effect is too small to produce meaningful weight loss on its own.
Is Celsius good for weight loss?
Celsius may support weight loss indirectly if it helps you exercise harder or replace sugary drinks. The drink itself does not cause significant weight loss without diet and exercise changes.
How much caffeine is in Celsius?
Most Celsius drinks contain 200 mg of caffeine per can, about the same as two cups of coffee. Health authorities generally consider up to 400 mg of caffeine per day safe for most adults.
Can I drink Celsius every day?
Most healthy adults can drink Celsius daily if total caffeine stays under 400 mg per day. People with heart conditions, high blood pressure, or who are pregnant should talk to a doctor first.
