Independent · No bias · 512 brands testedNo paid placementsLab-verified dosingUpdated weeklyAffiliate links disclosedPharmacist reviewedOpen methodologyScores set by the labIndependent · No bias · 512 brands testedNo paid placementsLab-verified dosingUpdated weeklyAffiliate links disclosedPharmacist reviewedOpen methodologyScores set by the lab
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C4 Original Pre-Workout Review

Cellucor·pre-workout·By FitLab Research Team
Cellucor C4 Original Pre-Workout
7.0
Prop. blendcGMP150mg caffeine
7.0
30-Second VerdictVerdict: Consider

The best-selling pre-workout in the US. Decent caffeine (150mg) but proprietary blend obscures beta-alanine and citrulline doses. Transparency is its biggest weakness.

7/10
Overall Score
6.8/10
Dosing
5.6/10
Transparency
Ingredient
7.4
Dosing
6.8
Transparency
5.6
Value
8.4
Prop. blendcGMP150mg caffeine

Verdict

The best-selling pre-workout in the US. Decent caffeine (150mg) but proprietary blend obscures beta-alanine and citrulline doses. Transparency is its biggest weakness.

Our Rubric Breakdown

Our 5-question rubric evaluates every supplement on ingredient quality, clinical dosing, label transparency, value per effective dose, and safety/certification status.

Full Review

Our detailed lab analysis for this product will be published shortly. Check back for the full breakdown including our batch assay results and ingredient-by-ingredient breakdown.

In the meantime, see our methodology page to understand how we score supplements.