Updated: 12/07/2017

Cellucor C4 claims to be “America’s #1 selling pre-workout.”

While that makes me feel better about buying it, I’m still sitting here wondering:

“Is it really that effective and what makes it #1?”

So here’s the deal: Cellucor C4 has creatine and beta alanine. Both have been clinically tested and are popular in fitness and bodybuilding, but are they effective enough to back up this product’s extravagant claims of “explosive energy?”

What’s the real story?

Check out these 4 things you absolutely HAVE to know about Cellucor C4.

Let’s get to it.

Cellucor C4 Readers: Click here to find out why we're giving away samples of our product, Boost.

What is Cellucor C4?

First off, Cellucor C4 is pre-workout supplement. The ingredients are:

  • Beta alanine
  • Creatine nitrate
  • Arginine AJKG
  • N-acetyl-l-tyrosine
  • Caffeine
  • Velvet bean seed extract
  • TeaCor

You add one scoop to water and drink. After accessing your tolerance level, you can use an additional scoop prior to training. Supposedly, you’ll experience unbelievable muscle pumps, explosive energy and intense focus.

Cellucor C4 hit the market in December of 2014. Cellucor, a brand started in 2002, is the company behind the supplement. The official website, online retailers and local stores sell the supplement. We like that it uses a few natural ingredients and the longevity of the business, but read on…

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Cellucor C4 Side Effects – “Mild?”

Our first issue tackled was Cellucor C4 side effects. “If you take this before a workout, you will probably get an energy boost,” said our Research Editor. “But, it also contains 125mg of caffeine per serving. This might be more than some are used to consuming in one sitting.”

One customer said, “Amazing pump.”

“This product gives you what you need to get that tone and build muscle,” said another user.

While some users talked about side effects, we located Cellucor C4 reviews where customers didn’t experience any reactions.

“Good clean energy. Definitely on my must buy list, “reported a customer.

Cellucor C4 Customer Testimonials

Taste – “Fruity Flavors”

According to Cellucor C4 pre workout reviews, taste was something on the minds of several users. One customer said, “Awesome product. Great taste. Love the watermelon and blue razz.”

Another user stated, “Great tastte (fruit punch) and does exactly what is says.”

Based on some reviews of Cellucor C4 ingredients, users enjoyed the refreshing flavors.

“Love the Icy Blue Razz. It’s my go to flavor,” said a customer.

“It’s hard to choose because they’re all good,” reported another.

Our research shows a connection between taste and lasting results. If users enjoy the flavors of Cellucor C4, there’s more likely to use it one a long-term basis.

The Science – “Effective?”

The statement is clear relating to Cellucor C4 ingredients. “Explosive energy for legendary workouts”. Let’s follow the research. There’s solid science showing beta alanine promotes athletic performance. Creatine nitrate, shown to be safe and effective, helps improve body composition. Caffeine is a proven metabolism booster. TeaCrine also ignites energy, improves concentration, while reducing fatigue.

What Users Are Saying

"Absolutely increases the effectiveness of my workouts. If you haven’t tried pre-workout and want to up your game in your routine, consider taking this. If you take it be certain to stay very hydrated during your exercise and try to carry bottled water around with you because this stuff will make you thirsty. Also don’t try to take it if you are going to be sitting for long periods of time (your body will literally shut down) or you want to go to bed within a few hours of taking it (will keep you awake)."

"This product definitely delivers the energy I need for a workout, but the flavor makes be dread taking it. So far, I’ve loved all the flavors this brand has to offer, but this one tastes incredible artificial and leaves a horrible taste in my mouth. I would receommend any flavor, except for the pink lemonade."

"Pass on this one. Flavor was good but immediate stomach issues that will leave you running to the bathroom mid set. I thought i had ibs untill i stopped taking this and the problems went away. Very painful. I read you really need to mix one scoop with 16 ounces of water to help but even than it was of no use symptoms stayed."

The Bottom Line – Does Cellucor C4 Work?

So, will Cellucor C4 pre-workout provide explosive energy? Well, we like that it contains a few natural ingredients and that the company is a trusted name in the industry. But, the only concern were the few reviews mentioning the effectiveness. Based on the profile, available research, and positive testimonials, we see think this one is a winner.

Another one that’s caught our attention is a supplement containing ingredients backed by science and positive user reviews.

Among the best products we’ve seen this year is one called Pronabolin. The formula contains nine clinically-tested ingredients, with results often published in journals. Customers tell us they see great results.

Also, the company behind Pronabolin is confident you’ll love their supplement, they’re offering a 120-day money-back guarantee and multiple-bottle discounts.

Learn More About Boost »
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Cellucor C4

What are the side effects of Cellucor C4?

Cellucor C4 side effects, as reported by some users, may include mild headache.

What are the ingredients in Cellucor C4?

C4 pre-workout contains CarnoSyn, Beta-Alanine, Creatine Nitrate (NO3-T), Caffeine and Arginine AKG.

How do I know if Cellucor C4 is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Boost, with scientifically backed ingredients.

Click here to get your sample of our powerful testosterone booster today.

How much caffeine is in a scoop of C4?

C4 caffeine content per scoop varies according to the specific product: Cellucor C4 Extreme contains 135 milligrams, Pre-workout contains 150 milligrams, 50X contains 200 milligrams and Mass contains 150 milligrams per scoop.

Does Cellucor C4 Work?

Though some users have reported success with Cellucor C4, it is a pre-workout drink powder so it won’t necessarily promote muscle growth. Creatine has been studied and it can hydrate muscles for faster recovery.

How much does Cellucor C4 cost?

Cellucor C4 is available for $23.99 for 30 day supply.

How many calories are in a scoop of C4?

One scoop of C4 contains 5 calories.

Do I have to have a blender to mix Cellucor C4?

While having a blender will ensure the drink mixes well, it is also possible to mix the drink with a shaker cup.

Should I cycle Cellucor C4?

It is recommended you use the product for up to eight weeks, then discontinue for 2 to 4 weeks.

Why does my skin feel weird after using Cellucor C4?

The beta alanine amino acid may cause itching and tingling about 10 to 20 minutes after using the product.

What is C4?

C4 is potent training supplement that is named for a powerful plastic explosive used by the United States Armed Forces.

Is C4 considered a steroid?

C4 is not a steroid.

How much C4 PRE-WORKOUT should I take?

Before exercising, take 1 scoop of C4. Do not consume more than 2 scoops per day.

What are the ingredients in C4 PRE-WORKOUT?

C4 PRE-WORKOUT contains CarnoSyn, Beta-Alanine, Creatine Nitrate (NO3-T), Caffeine, and Arginine AKG.

Cellucor C4 Ingredients

Cellucor C4 Ingredients and Supplement Facts

Serving Size: 1 scoop
Serving Per Container: 60
Amount per Serving% DV
Vitamin C250mg417%
Vitamin B6500mcg25%
Folic Acid250mcg62%
Vitamin B1235mcg83%
CarnoSyn Beta-Alanine1.6g*
Creatine Nitrate (NO3-T)1g*
Arginia Alpha Ketoglutatrate1g*
Explosive Energy Blend425mg*
Caffeine Anhydrous150mg*
Velvet Bean (Mucuna Pruniens) Seed Extract (standardized for L-Dopa)**
Theacrine (as TeaCrine)**

Other Ingredients: malic acid, natural flavors, citric acid, silicon dixoide, sucralose, calcium sulicate, acesulfame potassium, FD&C Red #40

We researched Cellucor C4 ingredients in order to give you the facts you want.

Beta Alanine

Beta alanine is an amino acid. It is not found in foods and instead is naturally made in the body. However, it can be created synthetically and put into diet supplements.

What Is It Supposed To Do?

Beta alanine naturally affects muscle in the body. When found in a supplement, companies claim it can improve athletic performance and increase exercise capacity.

Clinical Research

According to a study published in Journal of Strength and Conditioning Research/National Strength and Conditioning Association, “β-Alanine appears to have the ability to augment performance and stimulate lean mass accrual in a short amount of time (8 weeks) in previously trained athletes.” Although athletes gained lean mass, there were no reports of weight-loss.

One that’s caught our attention is Pronabolin. It contains clinically tested ingredients and supported by positive reviews.

Creatine Nitrate

Creatine nitrate is a more water-soluble version of creatine.

What Is It Supposed To Do?

Companies that sell creatine nitrate claim that it can improve athletic performance and energy.

Clinical Research

Very little research has been done on creatine nitrate. However, one study, published in the Journal of the International Society of Sports Nutrition, tested its long term effects, concluding, “Otherwise, all hematological safety markers remained within normal range, suggesting that CN supplementation has no adverse effects in daily doses up to 2 g over 28 days and may be an alternative to creatine monohydrate supplementation.”

N-Acetyl L-Tyrosine

N-acetyl l-tyrosine, also called tyrosine, is an amino acid that can be found in foods like meat, eggs, nuts, beans, oats, and wheat.

What Is It Supposed To Do?

Tyrosine is thought to help improve mental alertness.

Clinical Research

According to a study published in the International Journal of Obesity, “The bioactive supplement increased 4-h thermogenesis by 90 kJ more than placebo, and the effect was maintained after 8 weeks and accompanied by a slight reduction in fat mass. These bioactive components may support weight maintenance after a hypocaloric diet.” This bioactive supplement contained tyrosine, capsaicin, catechins, and caffeine.


Caffeine is a bitter stimulant found in tea, soda, and coffee.

What Is It Supposed To Do?

Caffeine can boost mental alertness and energy. However, if too much is consumed, it can cause negative side effects.

Clinical Research

According to a study published in Medicine and Science in Sports Exercise, “The additional 22% reduction in body weight, 25% reduction in epididymal fat-cell size, and 5 and 6% reductions in epididymal and retroperitoneal fat-pad weights, respectively, in the caf-ex group beyond the no caf-ex group support the hypothesis that fat loss with aerobic exercise can be increased when caffeine is ingested prior to the training sessions.” However, Cellucor C4 may not contain enough caffeine to warrant these effects.

Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

43 Cellucor C4 Reviews

  • Taste
    Bug (Verified User)

    I love the taste of C4 Blue Razz…its magically delicious!!

  • Halk

    Does C4 contain BCAA??

    • Veronica

      Hi Halk! For detailed product and ingredients information, please refer to our ‘ingredient’ tab.

    • Cal calington


  • kam

    Please can you tell me if C4 pre-workout helps for weight loss?

    • Candace (Editor)

      This product is a muscle boosting supplement meaning it’s designed to increase muscle not reduce weight. If you are looking for a weight loss product, you might want to check out Dietspotlight Burn – it has tons of positive reviews!

    • Cal calington

      Yes it does. It allows you to do more and have the energy to do so. Therfore it helps to lose weight if you go to the gym and go hard. Like anything else it only works if you work out hard.

  • Sam

    Hi i have been taking these for past 5 days but im not experiencing any explosive energy …and i do lift the same weights and the same rep .I correctly take this 20-30 mins before my workout . Why is not working ?

    • Anna (Editor)

      Hello. All users are different and can experience different weight-loss results.

  • Victoria (Editor)

    Hello Zia. All users are different and can experience different side effects; please make sure to consult with your physician before taking this product.

  • Gurkirat

    Im 16 year old boy, can i use it?

    • Your Name

      Im 16 and c4 helps me very good it increases my strength im very focus and My energy level is beyond what i thought it was try it

      • Summer (Editor)

        C4 is not suggested for use by anyone 16 years of age. You may want to talk with your doctor before you take this.

  • Wayne

    I’ve taken C4 for 3 days now and I can feel a big difference. I work out and I sweat allot. I play football. I’m small but big but I wanna get want to get bigger. How long do you have to take C4 until you can see a difference in your body?

    • Anna (Editor)

      Hello. All users are different and can experience different weight-loss results, but exercise in conjunction with a healthy diet and supplements, like Dietspotlight Burn, have shown to help with weight-loss.

  • Luke

    Take two scoops if you want to punch yourself in the face and run around in circles. 😅

  • Summer (Editor)

    Thank you for your input on this reaction, but if there is any potential for an allergic reaction we think it best to talk with a doctor.

  • Veronica

    Hello Sajid. All users are different and can experience different side effects; please make sure to consult with your physician and let them know about the side effects you were experiencing.

  • J.Mendez

    I have been using this product for about 3 months. Gives me that extra energy to workout after work.

  • joe

    shared this experience, came and went numerous times through the day

  • Jose A.

    It has a stim effect to it your supposed to feel that you will feel it less if your actually working out hard

  • Bryan

    I bought C4 today at my gym, I think I did a little bit more scoop then I was supposed to but it really worked. Was doing back and shoulder for 2 & half hours usually I’ll last for an hour and half. Felt great.

    • Kelly

      I love this product.. the taste not so great lol but worth it for the intense workout I get in the morning.

  • Cal calington

    C4 has a major effect on anyone who works out. It gives you a warm feeling, then a boost in heart rate a bit and blood flow. This stuff works.

  • Susan

    I am a 53 year old woman and I just started going to the gym. C4 has made a big difference! I am over weight so I thought working out was going to kill me . C4 gives me that extra little something that makes me feel like I am actually getting in a productive workout! Love this stuff!

  • Nichole

    I like C4… I been using it for a year now. I use it for my circuit training and regular workouts and I get a lot of energy and strength. It helped me stay motivated. I use to be 198 and I’m down to 145. I also use it when I’m tired and need energy to focus on my school assignments.. It wakes me up and keeps me focused.

  • Dawn

    I’ve not experienced any jitters or ill effects due to the caffeine, but I have found that it works very well with me. I’ve just used it this week alone, and my performance is 50% better. I can breathe better during the workout, my endurance has improved and I feel really good after the workout. It’s been so long since i’ve had muscle soreness due to harder efforts, which I have now. I wanted to better understand what ingredients are in the C4. I am more concerned with how long will this product really last, or is this just working because it’s new to my system. How will it work over a period of time?. Do you have any idea where I can find these answers.

  • Samay

    It is boosting my energy .. I can feel it but don’t know why I hav been hAving headache after workout …I feel like a heavy weight is in my head ….should I continue it or leave it??? I just started taking it for 3 days n since de 1st day itself I m having headache???? What should I do?????

    • Adrian (Editor)

      Hello Samy. All users are different and can experience different results; please make sure to consult with your physician before continuing this product to make sure its safe and effective for you to use.

    • marc

      you need to hydrate yourself bro

  • John doe

    c4 is a great product for gym use work use and sports use in the gym after taking it for about 9 days my pumps at the gym were unreal better than I have ever had with any other product I don’t know why everybody is complaining about the taste it’s actually better than most I’ve had alot of good flavors to choose from be sure to drink plenty of water as you take this as well

    • Dave

      I use it because it is one that actually tastes good! Strawberry Margaritta is great.

  • Why I had headache taking this ?
    gagandeep (Verified User)

    After having 3 days ,i felt no pump..my nutrition expert said take 2 scoop…n after taking 2 scoops for 2 days, i felt high voltage headache…i thought its might be by so much crowd in the gym..and next 2 days again same story
    Happened, i was shocked…now i stop the c4…can anyone reveal the reason behind??? thanks

    • Devon (Editor)

      Some dieters experienced the same. The only thing you can hope for is if 1). your body accustoms itself to the formula, 2). you reduce your dosage until the effects subside or 3). continue to exercise to increase healthy blood follow.

  • How first timer should use this ?
    Bert de Guzman (Verified User)

    In my first used this c4 pre workout i drink full scoop & in the miidde of my workout i feel headache and i decided to stop because this is not normal to me. Can you give me some recommendation or either suggestion on how to use it for the first timer? But i like this stuff..

    • Stephen (Editor)

      Bert, the company recommends taking one serving with 4 to 6 ounces of water 20 to 30 minutes before a workout. After finding the amount that suits you, you may add scoops. Do not exceed two servings in a 24-hour period.

      • Cal calington

        Finally a editor that actually reads the c4 label

  •  this stuff really works
    Melissa (Verified User)

    I just want to say that this stuff really works! Not the best taste in the world, but thanks to this amazing product, I have the boost and energy I need after a long day at work. Before C4, it would take me 45 minutes to walk/run a 5K Marathon. I have been taking C4 for four months now, and I’m so happy to share that I am now running at a perfect pace and breaking my own personal record of a 5K Marathon in 30 minutes. I also want to share to others, that do not give up on this product. The first week of taking C4, I almost gave up on it because of the tingly “wired” effects I was feeling throughout my body, so what I did the second week, was use only half a scoop to the same amount of water….and this did it for me! I am one happy user! 🙂

    • Carmela

      Do you notice any increase in your weight or body growth? I read some comments that says it helps with growth. I don’t wanna get bigger

      • Rob

        Carmela You only Gain Muscle through excess calories.

        • Summer (Editor)

          Hi Rob. We’re positive gaining muscle is not solely dependent on eating an excessive amount of calories. Macronutrients, especially carbohydrates and protein, play an important role, but eating too much can lead to weight gain.

          • Sid

            Plz don’t buy c4 you wont be able to sleep at night

      • Cal calington

        It helps muscle growth if you do weights. It increases how much cardio you can do if you do that.