C4 Sport: Identify the Exact Version
This label-based review covers the current U.S. fifth-generation C4 Sport Icy Blue Razz, selected as a 20-serving tub. Its Supplement Facts list one 12.2 g scoop. Older versions, other countries and other C4 products may differ; this is not a firsthand performance test.
What the Current Label Discloses
One scoop lists 200 mg caffeine anhydrous, 2 g CarnoSyn beta-alanine, 2 g L-arginine, 1.25 g betaine anhydrous and 1 g creatine nitrate. No citrulline is listed on this panel. Creatine nitrate is a compound: its 1 g weight is not 1 g pure creatine plus 1 g nitrate, and it should not be treated as an equivalent dose of creatine monohydrate.
The 200 mg caffeine figure is a label quantity, not a guarantee of a sensible or safe daily dose for every user. Follow the exact label warnings: Cellucor warns against combining it with caffeine or stimulants from other sources and restricts use to healthy adults 18 and older. Sensitivity, medications and health conditions matter; a smaller caffeine number does not establish overall product safety.
Check the Exact NSF Record
Cellucor markets C4 Sport as NSF Certified for Sport. The directory records checked on October 13, 2026 require a more specific match: record 1669063 is titled C4 Sport Icy Blue Razz, lists Blue Raspberry as flavor, and identifies a U.S. 244 g container with a 12.2 g serving and lots NTB20240203002 and 760169.
A separate record 1591995 also has an Icy Blue Razz title and 244 g/12.2 g details, but its Flavor field says Fruit Punch and its lot field says All. That inconsistency is unresolved here. Check your exact container and lot in the current directory rather than treating these entries as proof for every C4 formula or flavor. Certification does not establish personal suitability or guaranteed performance.
C4 Sport vs Bucked Up Original
The current U.S. Bucked Up Original Franken Juice label lists 200 mg caffeine, 6 g citrulline malate at a 2:1 ratio and 2 g beta-alanine per 10.6 g scoop. The 6 g ingredient total is not 6 g pure L-citrulline. These are label differences, not evidence that one finished product produces better pumps or endurance. Do not transfer C4 Sport’s certification claims to Bucked Up.
For evidence limits on individual ingredients, see the NIH exercise-supplement review. Athletes subject to drug testing should verify the exact product and lot rather than relying on a brand-wide statement.
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