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C4 Energy Drink Side Effects (Must-Know)

C4 Energy Drink Side Effects (Must-Know)

C4 energy drink is marketed as a pre-workout energy drink that gives your body an explosive boost in increasing your physical and mental capacity.

But, what are the side effects of C4 energy drinks?

C4 energy drink’s 300 mg of caffeine can give you a burst of energy and alertness for your activities such as workouts and exams. However, this amount of caffeine is higher than average and may cause negative side effects such as anxiety, insomnia, and increased heart rate when taken excessively.

There’s a lot to explore with C4 energy drinks, so read on, and join me as I explore all there is to know about C4 Energy Drinks.

Nutrition Facts of C4 Energy Drink

For starters, let’s take a look at the nutritional facts of C4 Energy Drink:

The nutrition facts of a can of C4 Energy Drink.
Nutritional Values of C4 Energy Drink
Nutritional InfoC4 Energy Drink (16 fl.oz)
Total Carbohydrates
Vitamin B3 (Niacin)30mg
Vitamin B12 (Methylcobalamin) 60µg
Basic Nutritional Information of C4 Energy Drink

C4 Energy Drink Ingredients

One of the best ways to start managing your health is to know the contents of what you consume, so here’s an easy-to-read list of ingredients in a can of C4 Energy Drink:

  • Carbonated water
  • Citric Acid
  • Natural flavors
  • Artificial flavors
  • Potassium sorbate
  • Sucralose (artificial sweetener)
  • Acesulfame potassium (artificial sweetener)

Besides that, C4 Energy Drink contains 6.73g of Explosive Performance Energy Blend, which has:

  • Caffeine anhydrous (200mg)
  • CarnoSyn Beta-alanine
  • Beta power Betaine Anhydrous
  • N-acetyl-l-tyrosine
  • Citrulline malate
C4 Energy Drink Ingredients at the back of the can.
C4 Energy Drink Ingredients at the back of the can

That said, do note that the ingredients of C4 energy drink may vary depending on which flavor your pick.

How Much Caffeine Is There In C4 Energy Drinks?

C4 Energy Drinks come with 120mg to 300mg of caffeine per serving, the caffeine content varying depending on the flavor you choose. If you pick a can with the lowest caffeine content available for C4, it would be considered a moderate amount.

That said, if you pick one with 300mg, it would be considered a high enough caffeine that puts C4 in the ranks of the strongest energy drinks.

Caffeine is one of the essential ingredients of energy drinks, and it serves as a natural stimulant that can keep you alert and awake for your tasks. It increases your energy, and with moderate caffeine consumption, you will get the following benefits:

  • Alertness
  • Improved Brain Function
  • Enhanced memory
  • Improved physical performance

That said, it would be important to note that the FDA recommends 400mg of caffeine as the daily limit for adults. Going overboard might cause serious problems like:

  • Anxiety
  • Body Fatigue
  • Rapid heart rate
  • Insomnia
  • Frequent Urination and Urgency
  • Addiction or dependence
  • Digestive issues
  • Muscle breakdown
  • High blood pressure

Hence, staying on the recommended and safe daily limit can help your body feel energize and equipped with an essential boost. As long as you stick to what your body can handle, you’ll be fine.

What you need to know about caffeine

Personally, I recommend 50mg to 100mg of caffeine in an energy drink as I find that it’s just the right amount to help me regulate my body without suffering from dependence and other negative side effects.

How Much Sugar is there in the C4 Energy Drink?

Cookies spelling out "sugar free".
C4 is sugar free!

C4 Energy Drink is a sugar-free beverage, so it doesn’t contain any sugar. However, it does contain artificial sweeteners, which give the drink its sweet flavor. The artificial sweeteners are sucralose and acesulfame potassium.

While sugar is known to be food for your brain, helping you feel energize and keeping you on track with your activity, it’s not without its side effects. Since the C4 energy drink doesn’t have any sugar, you don’t need to worry about the negative effects of sugar.

Remember, the recommended sugar consumption for a healthy adult is 36 for men and 24g for women. Having too much might trigger the following side effects:

  • High blood pressure
  • Weight gain
  • Inflammation
  • Tooth Decay
  • Obesity

If you’re interested in other energy drinks that don’t contain sugar, check out this article where I’ve listed some of the best energy drinks available in the market for that category.

Does C4 Energy Drink Use Artificial Sweeteners?

C4 Energy Drink contains artificial sweeteners, namely: sucralose, and acesulfame potassium. These artificial sweeteners don’t contain any carbohydrates or calories, so it’s a good partner to regulate your weight.


Sucralose is one of the approved and recommended artificial sweeteners by the FDA. It was known for being 400-700 times much sweeter than regular sugar. Another good point about it is that it’s calorie-free, so if you are worried about your insulin levels, know that sucralose won’t affect it at all.

However, it’s essential to know that the recommended acceptable daily intake of sucralose is only 5mg per kg of your body weight. Excessive consumption might result in the following side effects:

  • High blood glucose and insulin levels
  • Leukemia
  • Cancer
  • Irritable bowel syndrome
  • Related and triggers leaky gut
  • Weight gain
  • Generate toxic compounds

Acesulfame Potassium

Acesulfame potassium, also known as Ace-K, is 200 times sweeter than regular sugar. Besides that, similar to sucralose, this artificial sweetener has been approved by the Food and Drug Authority (FDA) for general consumption.

Despite that, there are some claims that Ace-K can lead to potential risks of the following health problems if taken excessively:

  • Cancer
  • Negative impact on the development of the baby during pregnancy

Therefore, it would be wise to note that the daily recommended consumption of Ace-K is 15mg per kilogram of the body weight to keep your body on the safe line.

Check this out to go deeper into understanding more about artificial sweeteners

As long as you drink C4 energy in moderation, and keep within the FDA-advised daily intake, you shouldn’t have any difficulties or troubles as the sucralose and Ace-K levels in C4 Energy Drinks are pretty modest.

Performance Energy Blend In C4 Energy Drink

Description of the Performance Energy Blend In C4 Energy Drink.
A look at the performance blend in C4 Energy Drink

The good thing about C4 Energy Drinks is that it has their own propriety blend. It has a total of 6.74g and contains the following ingredients:

  • Citrulline Malate
  • CamoSyn® Beta-Alanine
  • BetaPower® Betaine Anhydrous
  • N-Acetyl-L-Tyrosine
  • Caffeine Anhydrous

These ingredients are known for enhancing your physical performance and alertness, and also prompting other improvements in both physical and mental performance.

However, the downside of this Performance energy blend is the 200mg caffeine anhydrous. And you should pay close attention to this statement:

Statement regarding the Performance Blend.
Something that you should be wary of

With that it mind, it’s essential to know what the components of the C4 performance blend entail:

Citrus Malate

Citrus Malate is an amino acid that’s mostly found in the food that you eat. It’s commonly known as L-Citrulline, and it’s beneficial in boosting your energy and body’s overall performance. It also helps your body supply the needed proteins, improving your blood flow and minimize potential high blood pressure.

With the beneficial effects that Citrus Malate can provide in your body, it’s important to note that the daily dosage of Citrus Malate is only 3g to 6g. With this amount, it can assist your body’s performance.

The only problem we have is that the breakdown of the C4 Performance Blend is not detailed, so I can’t be too sure about the amount of each ingredient.

CamoSyn® Beta-Alanine

Beta-Alanine is one of the non-essential amino acids that aims to improve and develop your lean muscles. It’s also a good stimulant in improving your overall physical performance.

Note that the daily dosage of Beta-Alanine is 2g to 5g. However, the caffeine content of C4 is so strong that you cannot feel the effect of Beta-Alanine.

In general, with proper consumption of Beta-Alanine, you can improve your physical performance and increase your overall awareness of your environment.


Tyrosine is another example of amino acid. Know that amino acids are the building blocks of protein in your body.

The primary role of Tyrosine is to improve your thinking and memory skills. It greatly affects your mental performance and helps you perform with ease and vigor even under pressure and stress.

The other good thing about Tyrosine is that it supports your working memory as well. This makes your mind more flexible and enhances the processing of information.

Caffeine Anhydrous

Caffeine Anhydrous works perfectly the same as caffeine. It boosts your physical performance, just like caffeine. It keeps your body active and boosts your overall productivity at work.

Caffeine Anhydrous keeps you active and helps you maintain your balance. However, it would be best if you regulate your daily consumption. One serving of C4 energy drink can give you 200mg of caffeine anhydrous, and note that the recommended dosage is only 400mg.

Regulate your consumption to ensure that you are giving your body enough boost and balanced physical and mental well-being.

What Does C4 Energy Do in your Body?

C4 energy drink gives you an explosive energy burst that will surely increase your energy and performance. It’s definitely a good drink if you are looking for a boost. However, I don’t recommend consuming it regularly because it has quite a high caffeine content, having 100mg to 300mg depending on your flavor choice.

That said, C4 Energy Drinks can definitely help you increase your overall physical performance and improve your mental performance.

C4 Energy Drink Review

What are the Side Effects of Drinking C4 Energy Drink?

There’s a lot of things going on in one serving of C4 energy drink, and potential side effects would most likely result from its caffeine content. That said, the contents of C4 energy drink are sure to give you a boost in your mental and physical abilities, which is expected, especially since it’s marketed as a workout drink.

Regulated consumption of energy drinks can refresh your body for a specific time. It improves your overall wellness, and awareness of your environment. However, the most alarming thing about this is its caffeine content.

If you push yourself and go overboard with the recommended caffeine limit, you may encounter these side effects:

  • Anxiety
  • Muscle Cramps
  • Headache
  • Jitters
  • Tingles or numbness
  • Trouble sleeping

Therefore, it would be beneficial to stick to what’s recommended and make sure that you equipped your body with a balanced diet, enough rest, and regular exercise. Combining these can give you a killer move in improving your overall wellness and ensure that you have a healthy body.

REIZE (10 out of 10)

A glass of REIZE Energy Drink.
REIZE energy drink is the best!

If you’re looking for a healthier option for energy drinks, you should try REIZE.

REIZE is a powdered energy drink that contains only 50mg of caffeine, 11 calories, zero sugar. Each 4g sachet comes with a refreshing blend of taurine, ginseng, and B-vitamins, making it a good pre-workout drink.

Besides that, it also won’t affect your diet plan either, as it doesn’t give many calories to your diet.

REIZE can boost your physical performance just like C4 energy drink. It also ensures that you don’t end up having caffeine dependency and a sugar crash. Its contents are on the safe side, so you don’t need to worry. Another thing to consider is it’s a perfect on-the-go drink. You can have a sip whenever and wherever you are!

If you’re too busy with your work, studies, and other matters, you can also have a REIZE energy drink delivered right in front of your doorstep. It gives you convenience, and of course, the true value of your money. One serving of REIZE energy drink is only about $1.

It’s surprisingly cheap considering that it’s loaded with benefits.

So, try REIZE today, and enjoy the best that energy drinks have to offer.

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