C4 Ultimate Strawberry Watermelon
Backed by 33 studiesOverall grade based on research across 8 ingredients.
46out of 100Grade D
Research evidence score
Weighed against 33 published studies · led by Beta-alanine
Ingredient breakdown
D
Beta-alanineImproves exercise endurance and reduces fatigue
Research direction: Leans unsupportiveEvidence: 19 studiesDose: 3.2 GramEvidence strength: Weak - research is split or limited
Effects of beta-alanine supplementation on body composition: a GRADE-assessed systematic review and meta-analysis. (2022)Effects of beta-alanine supplementation on Yo-Yo test performance: A meta-analysis. (2021)Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis. (2024)
D
CreatineImproves muscle strength and power
Research direction: Mixed findingsEvidence: 9 studiesDose: 1 GramEvidence strength: Weak - research is split or limited
C
TaurineSupports cardiovascular function and exercise performance
Research direction: InconclusiveEvidence: 5 studiesDose: 1 GramEvidence strength: Moderate - supportive but mixed
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C4 Super Citrulline Pump MatrixSupplementation and health effects
Research direction: No studies foundEvidence: 0 studiesDose: 6 GramEvidence strength: Not enough research yet - no studies found for this specific claim
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Creatine NitrateSupports health outcomes
Research direction: No studies foundEvidence: 0 studiesDose: 1 GramEvidence strength: Not enough research yet - no studies found for this specific claim
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N-acetyl-l-tyrosineSupports health outcomes
Research direction: No studies foundEvidence: 0 studiesDose: 400 mgEvidence strength: Not enough research yet - no studies found for this specific claim
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Caffeine AnhydrousSupports health outcomes
Research direction: No studies foundEvidence: 0 studiesDose: 300 mgEvidence strength: Not enough research yet - no studies found for this specific claim
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Alphasize 50% A-gpcSupports health outcomes
Research direction: No studies foundEvidence: 0 studiesDose: 200 mgEvidence strength: Not enough research yet - no studies found for this specific claim
This summary describes only the ingredients and the research behind them — it is not a judgment of the product or its marketing. Grades reflect the weight of published evidence cross-referenced against 350M+ research papers. How we grade →
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