C4 Ultimate Review
- Strong across energy and performance
- Well-rounded across all four effects
- Most complete formula in C4 lineup
- Full electrolyte panel included
- High stimulant content overall
- Focus is the comparative weak point
- Part of a large, similarly-named lineup
- No dedicated hydration support
Effects Timeline
AI-estimated changes in effects over the first 3 hours after taking the recommended serving.
C4 Ultimate is the strongest, most complete product in Cellucor's C4 lineup — energy, pumps, and performance are all genuinely solid, with focus the only real step down.
Cellucor also sells C4 Original and C4 Sport, both meaningfully lighter formulas, so this is the one to reach for if you want the full-strength version.
Honest take: A well-rounded, fairly priced pre-workout that earns its spot at the top of the C4 lineup.
Ingredient breakdown
Every dose · every gap| Ingredient | Clinically effective dose | Dose in C4 Ultimate | Status |
|---|---|---|---|
| Beta Alanine | 3.2–4.5 g | 3.2 g | 100%Clinically effective |
| Citrulline | 4 g | 3 g | 75%Moderate dose |
| Arginine | 4 g | 3 g | 75%Moderate dose |
| Betaine | 2.5 g | 1.25 g | 50%Under-dosed |
| Creatine | 3 g | 1.03 g | 34%Under-dosed |
| Nitrates | 500 mg | 468 mg | 94%Almost clinically effective |
| Tyrosine | 2–8 g | 1 g | 50%Under-dosed |
| Caffeine (actual caffeine) | 200–400 mg | 300 mg | 100%Clinically effective |
| Methylliberine (Dynamine) | 100 mg | 50 mg | 50%Under-dosed |
| Tetramethyluric Acid (Theacrine) | 200 mg | 10 mg | 5%Under-dosed |
| Huperzine-A | 200 mcg | 50 mcg | 25%Under-dosed |
| Magnesium (elemental) | 50–150 mg | 20 mg | Hydration support |
| Sodium (elemental, hydration) | 0.3–1 g | 0.23 g | Hydration support |
| Potassium (elemental) | 100–400 mg | 190 mg | Hydration support |
| PeptiPump (Bioactive Lentil Peptides) | 200 mg | 200 mg | 100%Clinically effective |
| Calcium | 100–300 mg | 75 mg | Hydration support |
- Beta Alanine3.2 g100%Clinically effective
- Citrulline3 g75%Moderate dose
- Arginine3 g75%Moderate dose
- Betaine1.25 g50%Under-dosed
- Creatine1.03 g34%Under-dosed
- Nitrates468 mg94%Almost clinically effective
- Tyrosine1 g50%Under-dosed
- Caffeine (actual caffeine)300 mg100%Clinically effective
- Methylliberine (Dynamine)50 mg50%Under-dosed
- Tetramethyluric Acid (Theacrine)10 mg5%Under-dosed
- Huperzine-A50 mcg25%Under-dosed
- Magnesium (elemental)20 mgHydration support
- Sodium (elemental, hydration)0.23 gHydration support
- Potassium (elemental)190 mgHydration support
- PeptiPump (Bioactive Lentil Peptides)200 mg100%Clinically effective
- Calcium75 mgHydration support
Evidence references
Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis
The Effects of Creatine Supplementation on Upper- and Lower-Body Strength and Power: A Systematic Review and Meta-Analysis
Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis
Tyrosine for Mitigating Stress and Enhancing Performance in Healthy Adult Humans, a Rapid Evidence Assessment of the Literature
