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#3 in Pre-Workout Third-Party Tested

Cellucor C4 Ultimate Pre-Workout (20 Servings)

by Cellucor

"6g citrulline + 3.2g beta-alanine + 300mg caffeine + Cognizin — Cellucor's top-tier pre-workout with nootropic focus and 8,200+ reviews"

Amazon Rating
4.4/5
Reviews
8,200+
Price Range
$34-44
Servings
20 servings
Informed SportGMP Certified
Our Editorial Rating
7.8
Good
FormPowder
CategoryPre-Workout
SubcategoryPre-Workout (High Stim, Full Dose)
View on Amazon

Overview

Cellucor C4 Ultimate is the premium tier of the C4 line, providing 6g L-citrulline, 3.2g beta-alanine, 3.2g betaine anhydrous, 300mg caffeine, 250mg Cognizin (citicoline for focus), and 50mg Theacrine for sustained energy without the crash. The Cognizin citicoline is a patented form of CDP-choline that increases brain phosphatidylcholine synthesis, enhancing focus and mind-muscle connection during training. Theacrine (TeaCrine) provides caffeine-like energy without tolerance buildup — studies show no habituation even after 8 weeks of daily use. The 6g citrulline dose is at the clinical threshold (6-8g), and the 3.2g beta-alanine matches the clinical dose for carnosine loading.

Key Ingredients

IngredientAmount
L-Citrulline6000 mg
Beta-Alanine3200 mg
Caffeine300 mg
Cognizin (Citicoline)250 mg

Pros & Cons

What We Like

  • 6g citrulline (clinical dose)
  • Cognizin for focus
  • Theacrine (no tolerance)
  • 8,200+ reviews
  • 300mg caffeine

What Could Be Better

  • 20 servings only
  • Premium price ($34+)
  • 300mg caffeine (high)
  • Beta-alanine tingles

Who Is This For?

Best For

  • Experienced pre-workout users
  • Those wanting focus + pump
  • High-stim seekers
  • C4 loyalists wanting upgrade

Not Ideal For

  • Caffeine-sensitive
  • Pre-workout beginners
  • Budget seekers
  • Those wanting 30+ servings

Our Verdict

7.8/10 — Good

Cellucor C4 Ultimate is the premium C4 — 6g citrulline with Cognizin citicoline and Theacrine for focus and sustained energy. The top-tier C4 for experienced users; the 20-serving count is the main drawback.

Alternatives to Consider

No direct alternatives listed for this product yet.