C4 Energy's Cereal Killer brings fruity cereal flavor to the performance energy drink category -- 200mg caffeine, beta-alanine, zero sugar, and NSF Certified for Sport. Saturday morning nostalgia meets serious training fuel.
C4 Performance Energy just dropped what might be its most audacious flavor yet -- Cereal Killer, a fruity cereal-flavored energy drink that launches October 22, 2025. With its crime-scene marketing campaign and "WANTED" poster branding, C4's claiming this flavor is so good it's "suspected of killing off other flavors".
Bold claim? Sure. But with 200 milligrams of caffeine, CarnoSyn® beta-alanine, zero sugar, and NSF Certified for Sport® credentials, Cereal Killer backs up the hype with substance.
C4 Cereal Killer: The Flavor That's Ending Other Flavors?!
But it's not just all talk. Word is, this flavor has killed the Grape Frost flavor of C4. Are they really discontinuing that flavor in this fashion? If so, that's a wild way to refine a product line.
Meanwhile, we've seen cereal flavored protein powders, but we've definitely never seen an energy drink from a major company hitting one of these flavors. How will it work out?! Only one way to find out...
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The Crime Scene Campaign
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Just in time for Halloween 2025, C4's marketing team went all-in on the playful crime-scene theme. The campaign features "WANTED" posters claiming Cereal Killer is "suspected of tasting like fruity cereal" and "killing off other flavors". The bright yellow can splashed with colorful cereal loops and milk splatters creates a nostalgic Saturday morning vibe -- complete with evidence tags listing "victims" like Grape Frost and Arctic Snow Cone.
It's tongue-in-cheek, it's bold, and it's exactly the kind of creative risk that makes flavor launches memorable.
What's Inside C4 Performance Energy Cereal Killer
Beyond the playful branding, Cereal Killer delivers the same NSF-certified formula that makes C4 Performance Energy a trusted choice for collegiate and professional athletes.
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CarnoSyn® Beta-Alanine
C4 Performance Energy includes CarnoSyn® beta-alanine, clinically studied to fight fatigue and enhance muscular endurance. Beta-alanine works by increasing muscle carnosine levels, which helps buffer acid buildup during intense training. You'll likely feel the characteristic tingling sensation -- a sign it's working.
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200mg Caffeine
With 200 milligrams of caffeine per can, Cereal Killer provides explosive energy without pushing into the extreme territory of pre-workout powders. It's the sweet spot for sustained energy and alertness during training or competition.
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BetaPower® Betaine Anhydrous
BetaPower® betaine anhydrous supports power output and hydration. Research backs betaine for improving training performance and body composition when combined with resistance training.
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Zero Sugar, Zero Artificial Colors
C4 keeps it clean with zero sugar and zero artificial colors, delivering just 10 calories per 16-ounce can. The fruity cereal flavor comes from natural and artificial flavoring, with sweetness from sucralose and acesulfame potassium.
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NSF Certified for Sport®
The NSF Certified for Sport® seal means Cereal Killer meets rigorous third-party testing standards. Professional and collegiate athletes can trust it's free from banned substances -- a critical factor when your career depends on staying compliant.
The Verdict
C4's taken a risk with Cereal Killer, blending childhood nostalgia with sports and active nutrition. If you grew up pouring bowls of colorful cereal loops on Saturday mornings and now need performance nutrition that doesn't compromise on flavor or function, this bridges both worlds perfectly.
The fruity cereal flavor shouldn't work in a performance energy drink -- but somehow, it absolutely does. Combined with NSF certification for professional and collegiate athletes, clinically studied ingredients like CarnoSyn® beta-alanine and BetaPower® betaine, and zero sugar formulation, this isn't just a gimmick flavor. It's a legitimate training tool wrapped in one of the most creative campaigns C4's ever run.
Once you taste this, nothing else survives? We'll let you be the judge when Cereal Killer launches October 22, 2025.
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Disclosure: PricePlow relies on pricing from stores with which we have a business relationship. We work hard to keep pricing current, but you may find a better offer.
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