C4 Extreme

C4 Extreme

The new C4 Extreme is Clean, Clear, and Evolved with 2g Beta-Alanine for Endurance, 200mg Caffeine, and Double Nitrates.*
A blast of energy, pumps, blood flow, and endurance in one pre-workout with a now open-formula with no artificial dyes or flavors, full transparent without proprietary blends, and innovatine ingredients with enhanced formulas for extreme performance.*
8.5  out of 10  (28 Reviews)
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Product Overview

C4 Extreme
C4 Extreme Container

Performance Energy Evolved

Over two years in the making, spanning multiple formula tweaks and hundreds of flavor tests, C4® Extreme has been re-engineered and re-imagined from the ground up to help support explosive energy, extreme performance, powerful pumps, and mental alertness.* This is the product that defined a category, now evolved and updated.

We ran C4® Extreme through several hundred rounds of flavor sampling to make sure it exceeds every expectation, and we didn't settle for anything less than the best. If a flavor didn't measure up, we moved on. We're proud to say that C4® Extreme's flavor array wins in every way — including our new, naturally sweetened flavors.


Nitramax (NO3-C)™

Unlike Citrulline or Citrulline Malate, which work through a single mechanism, Nitramax™ supports two mechanisms of NO creation, the arginine pathway (eNOS) and the nitrate-nitrite conversion system, to help promote the ultimate pump.* Created by bonding citrulline with patented nitrates, Nitramax (NO3-C)™ is an advanced compound that delivers dual-pathway nitric oxide (NO) support.*

  • No Artificial Dyes.
  • No Artificial Flavors.
  • Fully Transparent Label.
  • No Proprietary Blends.
  • Innovative Ingredients.
  • Enhanced Formulas.

Introducing Project Clear Evolution: our mission to set a higher standard in sports nutrition. To elevate the entire C4® family—and beyond—by pioneering the next generation of premium, better-for-you performance supplements.

We're swapping artificial colors and flavors in favor of natural options, peeling back prop blends to showcase all the performance ingredients that make our products tick, and boosting our formulas with enhanced inputs for extreme performance.* This is the future of sports nutrition, and it starts with the all-new C4® Extreme.

Patented And Clinically Studied Ingredients

Caffeine Explosive Energy*

Caffeine anhydrous supports energy, mental alertness, and mental and physical performance.*

Carnosyn® Beta-Alanine Muscular Endurance*

This patented form of beta-alanine has been clinically shown to fight fatigue and improve muscular endurance.*

Nitramax (NO3-C)™ Citrulline Nitrate Nitric Oxide Booster*

Our exclusive dual pathway nitric oxide (NO) amplifier is formulated with patented nitrates to support better pumps and arc like lightning in your veins.*

NO3-T® Creatine Nitrate 2 in 1 Creatine & N.O. Booster*

This 2-in-1 performance and pump amplifier, both a creatine and NO booster, is formed when creatine is bonded with nitrates. Creatine Nitrate may help support strength, size, and pumps.*

Ratings & Reviews

C4 Extreme
Overall Rating
28 Ratings
Verified Buyer Rating
5 Ratings
Average Flavor Rating
7 Flavors
Top Rated Flavor
Ultra Frost
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Jul 27, 2020
Verified Buyer
  • 1 Naturally Sweetened Cherry Limeade

This product always gets the job done. Good pump. Great energy. If you’re not sensitive to caffeine, I highly recommend. Always been a solid product. The main reason for this review though is to warn you to never ever try the natural sweetened cherry limeade. I’ve tried most, if not all of the flavors and gave it a try due to the 10 flavor rating. Oh god. Mistake. Don’t do it. You’ll literally gain 20 years of age on your face due to scrunching it from the awful taste. Get a different flavor please don’t punish yourself in such a way. I’ve had the watermelon (10), midnight cherry (8), icy blue razz (10), and fruit punch (9). All great flavors. Just don’t do it. Don’t risk it. Stick to the good known flavors. But again, great product still! Just don’t get the natural sweetened cherry limeade... it’s a trap!

Apr 14, 2020
Verified Buyer
  • 4 Midnight Cherry

The product gave me the push I needed but not every time I used it. It’s almost like every other time I felt the effects. The cherry flavor is not my favorite and I wouldn’t order it again but maybe a better flavor. I’ve had better pre-workout but I’d give this one another chance since it has such great reviews.

Apr 04, 2020
Verified Buyer
  • 10 Midnight Cherry

Tastes great. I have given it an 8 overall though as I need a double scoop to get the desired effect. It was however a **** good preworkout once it was working.

Jan 03, 2020
  • 10 Watermelon

Excellent flavor & mixes so easy! Great energy and endurance, definitely will buy again!

Nov 04, 2019
  • 10 Naturally Sweetened Cherry Limeade

As a fan of all C4 products, I was and am really excited to see a naturally sweetened line of this product, finally! This is a really good, rather lower stim dose of preworkout which allows me to have some coffee during the day without getting weired out by too much caffeine. 200mg is perfect for a pre in my opinion, I am not a huge fan of really stimulant products. This performs very well for what is in it, but I would like to see more Beta Alanine and Citrulline in it as the pumps could be a little better. That aside, I love this product. The flavor for being stevia flavored is the absolute best I've had, period in this catagory. Cherry Limeade is outstanding. The mixability is perfect, no clumping and complete dissolution in 8-10 oz of water. Highly recommend this product and flavor!!

Oct 08, 2019
Verified Buyer
  • 1 Naturally Sweetened Blueberry Lemonade
  • 8 Fruit Punch
  • 9 Midnight Cherry

The blueberry lemonade is awful, tastes like straight chemicals. Tried dif amounts of water, dry shot, it is unusable. I hate to waste it but even mixed with others I can't even do it. Other flavors have been really good, decent energy, not bad for the price.

Sep 26, 2019
  • 2 Naturally Sweetened Blueberry Lemonade

Ignoring the fact that it was the worst pre workout I've ever tasted which I don't really care about anyway, the energy levels are very high for the start of my workouts but doesn't seem to sustain for as long as, evgn or pre kaged ect.

Sep 22, 2019
  • 9 Icy Blue Razz

You can tell Cellucor put a lot of time and effort into C4 Extreme. This Pre-workout is totally well-rounded, with a big aspect of being clean as well. As far as being clean, there's no dyes or artificial flavors, which you cannot say for a lot of products. It's also totally transparent on the label, so you know what you're actually consuming. As to the ingredients, the 200mg of caffeine is a nice dose, not too much so as to be too much caffeine in one scoop. There's also Carnosyn for endurance and Nitramax which gives some good pumps. Also, there's a dose of creatine for those looking for convenience giving creatine and a pre-workout as one. My experiences is that this product is very well-rounded in the 3 areas of pre's, being energy, focus and pumps. I had a good amount of all 3, and you could feel all 3 of those areas with one scoop. Finally, the flavor was great. Icy blue razz, with no dyes or artificial colors was perfect. I love Cellucor's blue razz flavors, and the mixing of one scoop with water in a shaker was as great as expected. Overall, a well-balanced pre-workout, with transparent label, makes for a great pre-workout!

Sep 06, 2019
  • 9 Icy Blue Razz

C4 Extreme Blue Raspberry Taste: Taste is awesome, they managed to get the same blue raz flavor in a product without all the additives Mix ability: No surprise here, no particles or anything after mixing. Also, sometimes I just toss a scoop in my mouth and no issue with that dissolving either. Price: Pretty much same price point as other Cellucor products which in my opinion are highly competitive. Effect: I like the 200mg of caffeine considering I've got a high tolerance for caffeine, you also get a good pump and go longer from the Beta Alanine and NO, and I always welcome creatine in my pre's. Overall: Another awesome product from cellucor, but without all the additives makes this my new go to for sure. Not a big fan of dyes and stuff being added to my pre's so this definitely puts this at the top

Sep 03, 2019
  • 10 Icy Blue Razz

Highly recommend this product if your looking for a strong pre workout that's great tasting and easy to mix. I'm a big fan that there is not any artificial dye or flavors.

Aug 29, 2019
Verified Buyer
  • 10 Icy Blue Razz

Great taste, easy to mix, energy, focus and no after crash. Great product!

Aug 25, 2019
  • 8 Icy Blue Razz

This preworkout didn’t disappoint! Nice steady release of energy, not too crazy tingling and no crash during or after the workout. Flavor was okay, not the best or worst. I usually supplement my preworkout with a pump product but with this one, it’s not needed

Aug 20, 2019
  • 10 Icy Blue Razz

Amazing product with an awesome profile and taste is spot on. HIGHLY recommend!!

Aug 20, 2019
  • 10 Icy Blue Razz

Where do I start?? I’ve been a longtime fan and user of Cellucor’s C4 preworkout and I was lucky enough to try their new C4 extreme and I’m very impressed! I noticed the flavor is a more light flavor and the coloring is lighter due to using natural ingredients. I took one scoop before the gym and I had one of my best workouts that have me some insane energy throughout. Even a few hours after I felt the energy. They got this product out of the park!!!

Aug 20, 2019
  • 10 Icy Blue Razz

Cellucor back with another great product. I love the C4 line and Extreme is no exception. The kick you get is fantastic, smooth and no real crash (at least for me). The icy blue razz doesnt taste chemically at all and provides a great workout.

2 Sizes
30 Servings
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6 Flavors
Fruit Punch
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Price: $34.99  ($1.17 / Serving)
Flavor Rating: 8.2


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A blast of energy, pumps, blood flow, and endurance in one pre-workout with a now open-formula with no artificial dyes or flavors, full transparent without proprietary blends, and innovatine ingredients with enhanced formulas for extreme performance.*

What's in Cellucor C4 Extreme

Serving Size 5.7g (Appox. 1 level scoop)
Servings Per Container30
Amount Per Serving %DV
CarnoSyn® Beta-Alanine 2 g
Citrulline Nitrate [as NitraMax (NO3-C)™] 1 g
Creatine Nitrate (NO3-T®) 1 g
Caffeine (as Caffeine Anhydrous) 200 mg
N-Acetyl-L-Tyrosine 200 mg
Huperzine A [from Toothed Clubmoss (Huperzia serrata) Aerial Parts Extract 50 mcg
† Daily Value not established
Other Ingredients:
Silicon Dioxide, Citric Acid, Calcium Silicate, Fruit and Vegetable Juice Powder (color), Sucralose, Natural Flavors, Acesulfame Potassium, Malic Acid.

Directions For C4 Extreme: Take one serving (approx. 1 level scoop) of C4® Extreme mixed with 6 fl. oz. of water, 20-30 minutes before training.

Warnings: THIS PRODUCT IS ONLY INTENDED FOR HEALTHY ADULTS, 18 Y E ARS OF AGE OR OLDER. Do not use if pregnant, nursing, currently taking PDE5 inhibitors or nitrates for chest pain. Before taking this product, consult a licensed, qualified, health care professional, especially if you are taking any other dietary supplement, prescription drug or over-the-counter medication; or if, you suspect you have or have been treated for, diagnosed with or have a family history of, any medical condition. This product contains caffeine and should not be used in combination with caffeine or stimulants from other sources. Discontinue use 2 weeks prior to surgery. Immediately discontinue use and contact a medical doctor if you experience any adverse reaction to this product. Do not use this product continuously for more than 8 weeks. Do not use if safety seal is broken or missing. Store in a cool, dry place. KEEP OUT OF REACH OF CHILDREN. This product is sold by weight, not volume. The density of the powder varies, and significant settling of powder may occur during shipping and handling. This product contains the servings indicated when measured by weight. Some individuals may experience a harmless tingling sensation, which is attributed Beta-Alanine. USE ONLY AS DIRECTED.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.