Top Rated
Pros
- Third-Party Tested Where It Matters: C4 Sport is NSF Certified for Sport — verifiable in NSF's own public database — which is the certification that actually clears an athlete for banned-substance testing.
- Dosed and Disclosed: C4 Original runs 200 mg caffeine and 2 g CarnoSyn beta-alanine per scoop across 30 servings at $34.99, with Cor-Performance Creatine at $18.99 for 72 servings and XTEND Original BCAA at $27.99 for 30.
- Backed by Real Corporate Weight: Parent company Nutrabolt has held BBB accreditation with an A+ rating since 2010 and operates from Texas, and Keurig Dr Pepper reportedly paid around $863 million for roughly 30% of it in December 2022.
Cons
- The direct store is the weak link, not the products — cellucor.com sits at 1.1 out of 5 across 807 Trustpilot reviews, almost entirely on fulfilment, subscriptions and support, so treat a direct order as a first order and check it lands before setting up a repeat.
- At 200 mg of caffeine a scoop, C4 is a genuine stimulant dose for adults only — worth spacing away from coffee and afternoons rather than stacking on top of them.
The Verdict
What sets Cellucor apart is that one of its products carries the certification the rest of the category only implies: C4 Sport is NSF Certified for Sport, listed in NSF's own database rather than asserted on a label. That distinction matters if you compete under testing, and it is worth reading precisely — the certification is per product, not per brand, so C4 Original and C4 Ripped do not carry it. Around that sit the staples: C4 Original at $34.99 for 30 servings with 200 mg caffeine and 2 g CarnoSyn beta-alanine, C4 Sport at $21.99, C4 Ripped at $39.99, Cor-Performance Creatine at $18.99 for 72 servings, Longevity Creatine with NAD+ at $29.99, XTEND Original BCAA at $27.99 and C4 Performance Energy ready-to-drink at $27.99. The company behind it is substantial. Cellucor launched in 2002 and is owned by Nutrabolt, legally Woodbolt Distribution, operating from the Austin area with XTEND acquired in 2017 and a minority stake in Bloom Nutrition taken in 2024. Keurig Dr Pepper took an equity position in December 2022, reported at roughly $863 million for about 30%, alongside a long-term distribution agreement for C4 Energy. Nutrabolt has been BBB accredited with an A+ rating since 2010, and we found no FDA warning letter, recall or FTC action against the brand.
C4, Creatine and XTEND Under One Roof
Cellucor is a sports nutrition brand launched in 2002 and owned by Nutrabolt, legally Woodbolt Distribution, headquartered in the Austin, Texas area. Sibling brands are C4 Energy and XTEND, acquired from Scivation in April 2017, alongside a minority stake in Bloom Nutrition taken in January 2024. In December 2022 Keurig Dr Pepper took an equity position reported at around $863 million for roughly 30% of the parent, together with a long-term direct-store-delivery agreement for C4 Energy. The range covers pre-workout powders, creatine, amino acids, ready-to-drink energy and fat burners.
Current direct pricing: C4 Original Pre-Workout at $34.99 for 30 servings, or $24.50 on subscription, delivering 200 mg of caffeine, 2 g of CarnoSyn beta-alanine and the PeptiPump blend per scoop; C4 Sport Pre-Workout at $21.99, or $18.70 on subscription, with 200 mg caffeine, CarnoSyn beta-alanine and electrolytes; C4 Ripped at $39.99 and C4 Ripped Sport at $25.99, both 30 servings; Cor-Performance Creatine Powder at $18.99 for 72 servings, with a flavoured 50-serving version at $17.99; Longevity Creatine with NAD+ at $29.99; XTEND Original BCAA Powder at $27.99 for 30 servings; C4 Performance Energy at $27.99; and SuperHD Fat Burner at $29.99. C4 Original is taken as one scoop in six to eight ounces of water twenty to thirty minutes before training, and is labelled for healthy adults aged 18 and over.
On third-party testing, the important detail is that certification is per product rather than per brand. C4 Sport is NSF Certified for Sport and can be confirmed in NSF's own certified-product database, and Nutrabolt ran a dedicated campaign around that certification for C4 Energy in February 2025. C4 Original is not NSF Certified for Sport.
Nutrabolt holds an A+ Better Business Bureau rating and has been BBB accredited since 16 February 2010. Reading the complaints closely, they concentrate on the direct-to-consumer experience. Most C4 volume sells through Amazon, GNC and Walmart, where the retailer handles returns, so the practical advice for anyone ordering direct is to place a single order first and confirm it arrives before committing to a subscription.
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