Certification status
NSF Certified for Sport
C4 C4 Performance Energy® Cosmic Rainbow
C4 Performance Energy in Cosmic Rainbow is a zero-sugar, carbonated ready-to-drink energy can from Cellucor, with caffeine and CarnoSyn beta-alanine. NSF Certified for Sport — every batch screened against 280+ banned substances. £13.49 on Amazon UK for a multipack, rated 4.5 from over 380 reviews.
Buy in the UK
- Paid linkView price at Amazon UK
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Why this certification matters
- NSF Certified for Sport
- NSF Certified for Sport is designed for athletes in tested sports; each lot is tested for substances banned by major sports organisations.
Frequently asked questions
- Is it a powder or a drink?
- A ready-to-drink carbonated energy can, not a powder you mix.
- What does NSF Certified for Sport cover?
- Every batch is screened against 280+ banned substances — the standard used across professional sport.
- Is the £13.49 for one can?
- No — the Amazon UK listing is a multipack of cans.
- Does it contain beta-alanine?
- Yes — it includes CarnoSyn beta-alanine alongside caffeine. The tingle some people feel is from the beta-alanine.
