Cellucor / C4 / Xtend

The household names in pre-workout and recovery.

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Cellucor is the sports nutrition brand best known for C4 pre-workout, and its parent company Nutrabolt also makes C4 Energy and Xtend. I've reviewed C4 in powder and in can form, and the flavors are what keep me coming back to it.

What Cellucor does best

Big-name pre-workouts with real doses, and flavors people actually want to drink. The Ultimate line is the high-energy end of C4, with 300 mg of caffeine anhydrous per scoop. Cellucor also keeps leaning into candy collabs: in September 2024, Nutrabolt announced a collaboration with The Hershey Company covering Jolly Rancher energy drinks, a Bubble Yum pre-workout and a C4 protein powder in Reese's and Hershey's chocolate flavors.

My recent Cellucor reviews

C4 Alpha Bomb Sport, Lightning Lemon Berry (October 2026): The coolest athlete pre-workout I have seen this year. It has 0 mg of caffeine and 200 mg of enfinity paraxanthine, plus creatine monohydrate, beta-alanine and electrolytes. The branding is cool and the flavor is solid. I gave it an 8.8 out of 10. Watch the review.
Cellucor Labs X-Strength, Blue Raspberry (September 2026): 5 g of creatine monohydrate and 3 g of myHMB with 500 IU of vitamin D3. It reminds me of a blue raspberry slushie, so I gave it a 9 out of 10, and I have been using it quite frequently. Watch the review.
C4 Energy Mango Fuego (May 2026): 200 mg of caffeine, 5 calories and 0 g of sugar. The mango flavor is pretty good, and the spice is a peppery feeling at the back of your throat rather than hot sauce. Interesting, but not really my thing. Watch the review.
C4 Energy Cereal Killer (February 2026): 200 mg of caffeine and 10 calories. It tastes like cereal, a lot like Fruit Loops, and it is one of the most unique energy drinks I have tried. I gave it a 9.8 out of 10 and recommend it. Watch the review.

Who it's for

If you like a strong pre-workout and a familiar brand you can find in a lot of stores, C4 is an easy place to start. If you are sensitive to caffeine, the Ultimate formulas will probably be more than you want, and a lower-stim option may suit you better.

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Cellucor / C4 / Xtend FAQ

Does Cellucor have a discount code?

Yes. Use code LUCAS973 at checkout on Cellucor, C4 and Xtend to save a little bit of money.

What is the best Cellucor pre-workout?

If you want maximum energy, I like C4 Ultimate, which has 300 mg of caffeine, 6 g of L-citrulline and 3.2 g of beta-alanine per scoop. It is not for caffeine-sensitive people. If you want a pre-workout with 0 mg of caffeine, I gave C4 Alpha Bomb Sport an 8.8 out of 10. It uses 200 mg of enfinity paraxanthine instead.

Is Cellucor worth it?

C4 is sold at GNC, Walmart, Target and Costco, and the doses on the Ultimate formula are solid. Recently I gave C4 Cereal Killer a 9.8 out of 10 and Cellucor Labs X-Strength in Blue Raspberry a 9 out of 10.

Where is Cellucor sold?

On cellucor.com, and at GNC, The Vitamin Shoppe, Walmart, Target and Costco. C4 energy drinks are also sold at retailers like Amazon, H-E-B, 7-Eleven and Kroger.