C4 Extreme Energy

C4 Extreme Energy

Explosive High Sensory Pre-Workout Energy*
Contains 300mg of Caffeine & Other Stimulants to Help You Burst Through Workout!*
8.8 out of 10 (83 Reviews)
1 Size
30 Servings
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4 Flavors
Cherry Limeade
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2 For $55
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Price: $39.99 ($1.33 / Serving)
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Flavor Rating: 8.6
Buy 2 For $55
For a limited time, buy 2 C4 Extreme Energy, 30 Servings for $55!

Product Overview

C4 bottle product image

C4 Extreme Energy

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.

Ratings & Reviews

Overall Rating
83 Ratings
Verified Buyer Rating
10 Ratings
Average Flavor Rating
4 Flavors
Top Rated Flavor
Strawberry Kiwi
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  • 9 Cherry Limeade

It's okay but I think I like the C4 Ripped better still.

Verified Buyer
  • 8 Strawberry Kiwi

Great energy throughout the workout. Gives a solid pump and really gets your "juices flowing." Would recommend over all other preworkouts I've used.

Verified Buyer
  • 8 Icy Blue Razz
  • 3 Strawberry Kiwi

I totally hate the taste of Strawberry Kiwi. Icy Blue Razz is way better than that. I see people rating the Strawberry Kiwi 10/10 and that was the reason I bought it. I recommend the Icy Blue Razz over that.

  • 10 Icy Blue Razz

Through my previous experiences with other different types of C4s I have tried I thought this one was another great addition! I have recently tried the Icy Blue Razz flavor and I must say it was strong and tasty. I have tried many Icy Blue Razz flavors in the past with Cellucor and they have always been excellent. This one in particular was a little bit chemically but was not difficult to drink but was still great. I have only used 1 serving with 10 oz. of water in my shaker and the mixing was excellent as always. Clean and quick. The energy and focus was definitely noticeable and lasted throughout my entire workout. I really liked how after my workout I did not feel any sudden crashes or exhaustion. The strength and muscle pumps were terrific as well just like any other C4 products. If your someone like me who works long hours and immediately goes to the gym after this would be a great product to try out. The 300mg of caffeine did help me push through my workouts but based on my experience it is good to have something small in your stomach instead of taking it on an empty stomach, so you don't feel too wired and suddenly feel nauseous. I did not have any issues taking this product and would try it again!

  • 10 Icy Blue Razz

One hell of a preworkout. I have been using this product for a month and the kick never changes. Every day I go into the gym I’m ready to kill my workouts. None of those caffeine headaches or jitters, just clean strong energy!

  • 10 Icy Blue Razz

I have tried several different preworkouts (from other brands) and I always fall back on Cellucor. I love how they have different varieties and blends to fit different needs and they have a bunch of different flavor options! The flavors are always good, it always mixes well and it doesn't have any funky after tastes. This product in particular seemed to be similar to C4 Ultimate to me. This product gave me sustained energy and it wasn't a quick hit and done! It really helped me power through a great workout! I will definitely be using again in the future!

  • 9 Lemon Drop

I received a container of the Lemon Drop flavor from a promo win and after using it 4x I can say that the energy and intensity that you get during your workouts definitely lives up to the name C4 Extreme. The powder mixes up easily with really no foam or sediment. The flavor for me worked best in 12oz of ice cold water where at first sip it will start off slightly harsh but then just mellows into a not too sweet and just enough sour to really nail the lemon drop flavor which I really enjoyed drinking and if anyone likes lemon flavors I don't think you'll be disappointed with the flavor. The energy kicks in about 15 min after consuming but it's a very alert feeling and about 30-45 min after that's when the EXTREME part kicks. First you'll feel a warming sensation throughout your body and then you'll feel a jittery sensation come on but it's not overwhelming but it's there and you''ll feel it for the rest of your workout and for me it just made the PW feel more intense which I LIKED! The energy last throughout your workout and beyond so this is an improvement from the regular C4 which for me the energy really never lasted long. If you can handle yohimbine then this is definitely one I would recommend but if your sensitive to it then I'd say find a pre that doesn't have it cause you'll feel the effects of the yohimbine in this one. As for pumps they aren't mind blowing but you'll get better vasularity from it because of the nitrates in it but I'd recommend stacking it with either 6 gm of citrulline malate or any stimulant free pump supplement of your choice. Overall I'm rating this an 8.5/10 which is the same rating I gave the C4 Ultimate because for me the energy was just as intense which I thought was a big improvement over the original C4 and though the pumps aren't as intense as the Ultimate cause that one includes 6 gm of citrulline malate you get 30 servings with the Extreme so that's 10 more than the Ultimate so I would strongly recommend grabbing the Extreme and just pair it with what ever stimulant free pump ingredient you'd like. One thing I always recommend is have a couple of pre's on hand and rotate them each and every workout so you don't become tolerant from using the same one every workout. Cellucor definitely has a good high energy PW that delivers intense, long lasting energy which will help get you through some tough workouts in the gym.

Verified Buyer
  • 10 Lemon Drop

In terms of flavor, the lemon drop is my new favorite, followed by Icy Blue Razz, which is also great. For pump, the beta aline gives a nice tingle, but isn't overpowering. For performance, the caffeine gets me through some of my most intense lifting sessions.


I have been using C4 50X until it was discontinued and C4 extreme energy replaced it. Personally, I prefer the 50X over the new brand. 50X didnt make me sweat like I do with the extreme energy. By the time I have finished my workout I am soaked. I do get a good workout but its no different than the old 50X. The tingles are less with the new brand even though it has more Beta-Alanine than the 50X?!?!?! I still rate this pretty high because I do have great workouts with this, but I hate being soaked with sweat. 50X was the best.

Verified Buyer
  • 10 Strawberry Kiwi

Love the focus, love the rush of energy, love the taste, love how smooth it mixes, loved the buy 1 get 1 50% off, and most importantly love the purity of the ingredients.

  • 8 Cherry Limeade
  • 6 Lemon Drop
  • 10 Icy Blue Razz
  • 7 Strawberry Kiwi

Great product! Will suggest to friends All of the energy I got from these was intense, Forsure only suggest 1 scoop of these. I did take 2 scoops and my heart was racing!!!

Verified Buyer

I LOVE cellucor C4, and they boosted it with EXTREME ENERGY!! Exactly what the dr. Ordered. When I'm getting ready to get my GAINS I always down a c4 pre workout to boost my workout. If you are looking for maximum results with a great taste, then I suggest the Cherry Limeade C4 Extreme Energy.

  • 9 Cherry Limeade

Believe it or not, this was my first time trying C4! I consider myself to be a mild stim junkie, but I do have to moderate my pre workout caffeine if I want to be able to drink my coffee afterwards! I did 1/2 scoop about 30 minutes before the gym. This product does have a little bit of creatine, arginine and beta-alanine in it, but I mostly felt the caffeine and the caffeine like ingredients. Energy was good, but like I said, a bit caffeine heavy for my preference in a PWO. However, that is the marketing for this specific product so it does what it says! Mixed easily in my shaker bottle, and tasted delicious. The only thing I would change is the "Energy Blend" - it makes it hard to decipher how much stimulant you're actually getting, but the packaging says 300 grams Caffeine so I'll go with that. Overall, 7/10, recommended for stim junkies! I cold also see myself drinking this instead of coffee on those hot summer days.

  • 9 Cherry Limeade
  • 8 Lemon Drop
  • 8 Icy Blue Razz
  • 9 Strawberry Kiwi

This pre kicked in about 5 min of me taking it and gave me the right amount of energy I needed to get through my workouts. The taste is good and mixes well. Highly recommended.

  • 5 Cherry Limeade
  • 5 Lemon Drop
  • 8 Icy Blue Razz
  • 9 Strawberry Kiwi

Cellucor's entry into the 300mg caffeine preworkout club yield Extreme mental drive and explosive energy out of the gate. I got to try samples of each flavor courtesy of the Cellucor forum reps. I would classify this preworkout as mental overdrive, more so than a high-pump pre, or smooth endurance pre. Once I drank this I could not sit on it too long before I had to -- had to -- had to -- get moving! It hits hard - every serving. My test results were more explosive energy in the front end for my heavy sets. I was able to increase my weight and felt compelled to do so. The burnoff was same amount of time as most other decent preworkouts. They all mix very easily, and are brightly colored. Strawberry Kiwi was easily the best flavor. The others tasted salty to me (not as much witch blue razz, but a little). Could just be personal.

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.