C4 Extreme Energy

C4 Extreme Energy

Explosive High Sensory Pre-Workout Energy
Contains 300mg of Caffeine & Other Stimulants to Help You Burst Through Your Tolerance Levels!
8.5 out of 10  (37 Reviews)
2 Sizes
30 Servings
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4 Flavors
Cherry Limeade
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Price: $39.99 ($1.33 / Serving)
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Flavor Rating: 8.8
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For a limited time, buy 1 C4 Extreme Energy, 30 Servings & get 1 50% OFF!
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For a limited time, buy 1 C4 Extreme Energy, 50 Servings & get 1 50% OFF!

Product Overview

C4 bottle product image


All pre-workouts are not born equal. Some provide a little energy, some provide the kick you need to build mass, some help you lose it. But what you need is energy. Boundless energy. Your intensity comes after an extreme jolt, so we’ve added the most stimulating, caffeine-loaded pre-workout supplement to our C4 ID Series. C4 Extreme Energy is made for your passion, steady drive and unbroken commitment to your workouts.

If you find yourself drinking cup after cup of coffee throughout the day and built your caffeine tolerance above the rest, C4 Extreme Energy is made for you.

C4 Extreme Energy is the next step for those who want that extra rush. Its formula features more than twice as much caffeine, more focus and more endurance than C4 Original. C4 Extreme Energy isn’t for the casual gym goer; it’s for those of you who want to explode through their PRs over and over and over again. We know that for some, just a little bit of energy isn’t enough. C4 Extreme Energy is here to help you get up and go, rising to any challenge.











*Includes all C4 products over product line lifetime.

Customize Your C4 Experience
Cellucor C4 Product Line
C4 to the highest power.
  •  Explosive Energy*
  •  Nootropics*
  •  Mood Enhancers*
  •  Pump Amplifiers*
  •  Endurance Boosters*


Cellucor C4 Ultimate
Cellucor C4 Original
C4 Original packs explosive energy, endurance, focus, and pumps all in one scoop.*
  •   Explosive Energy*
  •   Increased Endurance*
  •   Increased Focus*
  •   Increased Pumps*


C4 Ripped provides explosive energy and a cutting formula.*
  •   Explosive Energy*
  •   Creatine Free*
  •   5 Ingredients for Fat Loss*


Cellucor C4 Original
C4 Zero is for users who want increased energy and endurance without Beta Alanine or Creatine.*
  •   3g of Citrulline Malate
  •   2g Instantized BCAAs
  •   Zero Tingles (Beta-Alanine)
  •   Zero Creatine


Cellucor C4 Original
Cellucor C4 Original
C4 Mass explosive energy and mass builder.*
  •   Explosive Energy*
  •   CreaCarb™ Blend for Mass*
  •   Unbelievable Muscle Pumps*
  •   Improve Strength*


C4 On The Go provides explosive energy and performance without the shaker.*
  •   Explosive Energy*
  •   Creatine Free*
  •   8 Calories, 2g Carbs, 0g Sugar*


Cellucor C4 Ultimate

Ratings & Reviews

Overall Rating
37 Ratings
Verified Buyer Rating
4 Ratings
Average Flavor Rating
4 Flavors
Top Rated Flavor
Strawberry Kiwi
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Verified Buyer
  • 10 Lemon Drop

Woah! Wake up! C4 Extreme Energy helps me when I wake up at 0200 to work out before my 0400 shift at the airport!


Great product! Will suggest to friends

  • 9 Cherry Limeade
  • 8 Icy Blue Razz

I was given the chance to sample some of Cellucor's well known C4 products in order to review them here on the site. For me, I've never really used pre-workout, so this was an interesting experience. Between the zero and the extreme, I found that I liked this set better and it was overall a good experience. Icy Blue Razz I wasn't sure about this flavor before trying because most of the time, I'm not a big fan of blue raspberry flavors. It seems weird putting blue and raspberry that gives me this automatic impression of something a little fake. They often have that slightly altered taste, just like how cherry can often have that cough drop flavor/reminder and a couple of others do give off the often artificial taste. So, I went in this one not expecting to have the greatest result in personal opinion over taste. It was pretty good. I kind of like this one, even more than one of the zero flavors. The extreme has the stronger result since it's geared exactly for that but also, just the flavor had an appeal. It still wasn't like that "oh natural raspberry" but for this one, the result was much better than others I have experienced and way better than the fruit punch pre-workout I had over a year ago. I used it before a simple workout so I didn't really need a huge boost but it wasn't over the top either. None of the pre-workouts were that intense, not from the samples at least. The only eh moment was the last couple of sips on this one and more that had a little grit like I needed to maybe use just a little more water than I had. Flavor 8/10 Mix 8/10 Result 8/10 Cherry Limeade I picked this flavor as it's one that sounded the best in the moment of deciding and beyond. It was consumed over a week ago before a mid-morning heavy session at the gym. I didn't get up early but at the dame time, it was earlier in lifting for me than normal and it was a day to attempt heavy deadlifts without consuming much beforehand. The Flavor: Had great flavor. The cherry and lime elements were both present. This one was not the zero, it is ultimate, but even then it's light in the calories. The product has 5 calories per scoop, which is good for those of us doing a cut and needing a boost. I will say that the flavor did have a sweet element that was noticeable right away. The flavor profile was strong and sweet, which is good for me as I'm a fan of sweet for the most part (except maybe watermelon as I do like my sour candy). I consume candy a little too often but that's another story... Either way, I did like this flavor and it is one that I'd consider buying if/when I have funds for a pre-workout. The Result: It didn't amp me up or anything. I'm low key in general so there isn't much of a chance with me getting all hyped up and I consume caffeine enough to have a certain level of tolerance. However, I did feel a boost that day. It was 1 rep max testing and I managed to get the 1 rep deadlift of 265 lbs, which I was very pleased to finally achieve. It had been a goal the peak cycle before but failed then and doing another attempt after trying during a somewhat failed cut cycle was going to be a challenge. I made it and had energy for work afterwards. The site claims the extreme isn't for the casual lifter but I didn't notice an intense result, just enough of boost to keep me going to get through the workout of the day. Quick Version: Flavor - 9/10 Mixability - 9/10 Results - 9/10

Verified Buyer
  • 5 Lemon Drop

Tried this pre-workout and surprisingly wasn't a fan of the taste at all. I usually like lemon flavored things, but this was a bit too sour with a weird after taste. 15 minutes after taking the product, I felt an obnoxious amount of tingles and I felt extremely itchy as well. I know that this is the result from the beta-alanine in the product, but I've never had a pre workout thats given me a reaction quite like this one. Nonetheless, after I finally began my workout, I ended up having one of the best workouts I've ever had! I tried taking this stuff multiple days after as well to make sure it just wasn't one time, but I can honestly say that this pre workout is definitely worth it, regardless of the before effects. I will definitely be buying again, maybe just a different flavor.

Verified Buyer
  • 9 Lemon Drop

I love the refreshing lemon drop flavor! Perfect for summertime and something different than the usual fruit punch or watermelon flavors. I have not taken a full scoop of this product yet (as I rarely take pre workouts or full doses on them) so my review is based on half the recommended serving! But compared to other C4 products, I feel like the onset is a little faster. Even with half a scoop, I shortly start to feel the beta alanine effects and awakening of my energy. Now, I'm not one to usually drink my pre workout, rather I take powder shots, and I don't know if it's the flavor (lemon drop) or the overall product compound, but when I take a powder shot of this product, it has a slight salty taste, that I do not get from other C4 products. But again, I don't know if thats due to my flavor of choice. Overall, still a top favorite pre workout of mine!

Buy 1 Get 1 50% Off
50 Servings
50 Servings
$1.20 Per Serving

What's in Cellucor C4 Extreme Energy

Serving Size: 1 Scoop (9g)
Servings Per Container: 30
Amount Per Serving %DV **
Calories 5       
Total Carbohydrate 1 g <1%**
Vitamin C (as Ascorbic Acid) 250 mg 417%
Niacin (as Niacinamide) 60 mg 300%
Vitamin B6 (as Pyridoxal-5-Phosphate) 1 mg 50%
Folic Acid 500 mcg 125%
Vitamin B12 (as Methylcobalamin) 70 mcg 1,167%
CarnoSyn® Beta-Alanine 3.2g
Creatine Nitrate (NO3-T™) 1g
Arginine Alpha Ketoglutarate 1g
C4® Extreme Energy Blend 831mg
N-Acetyl-L-Tyrosine, Caffeine Anhydrous (300mg), Velvet Bean (Mucuna pruriens) seed extract (standardized for L-Dopa), Theacrine (as TeaCrine®), Rauwolfia vomitoria root bark extract, Huperzine A (from Toothed Clubmoss (Huperzia serrata) aerial parts extract)
** Percent Daily Values (% DV) are based on a 2,000 calorie diet. † Daily Value not established.
Other Ingredients:
Natural And Artificial Flavor, Citric Acid, Malic Acid, Silicon Dioxide, Acesulfame Potassium, Sucralose, FD&C Red #40.

Directions For C4 Extreme Energy: Take one serving (1 scoop) of C4® Extreme Energy, mixed with 6-8 fl. oz. of water 20-30 minutes before training. During your workout, it is recommended that you drink plenty of water or performance beverage to stay hydrated. Some individuals experience a harmless tingling sensation, which is attributed to beta alanine. USE ONLY AS DIRECTED. 

Warnings: THIS PRODUCT IS ONLY INTENDED FOR HEALTHY ADULTS, 18 YEARS OF AGE OR OLDER. Do not use if pregnant, nursing, currently taking PDE5 inhibitors or nitrates for chest pain. Do not take this product before consulting a licensed, qualified, health care professional 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.

* 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.