Cellucor
C4 Ultimate Energy Drink Review
Servings / container
1
Price per serving
$2.99
Cost per point
$0.74
per formula score point
Caffeine
300 mg
≈ 3.2 cups of coffee
Serving size
1 can (16 fl oz)
Daily schedule
Once daily
Strengths
- Genuine tri-stimulant diversification
- Zero sugar, zero calories
- A real, if modest, taurine dose
Watch-outs
- Some amounts are estimated only
- No pump-supporting ingredients
- High combined stimulant load
Effects Timeline
AI-estimated changes in effects over the first 3 hours after taking the recommended serving.
AI analysis
A real three-way stimulant stack — 300mg caffeine paired with a conservative estimate of two other stimulant compounds designed to smooth out caffeine's typical spike-and-crash, one fast-acting and one longer-lasting.
Exact amounts aren't disclosed on the can.
Honest take: A genuinely well-thought-out energy drink for the price, even if the exact blend stays a bit of a mystery.
Ingredient breakdown
Every dose · every gap| Ingredient | Clinically effective dose | Dose in C4 Ultimate Energy Drink | Status |
|---|---|---|---|
| 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 | 25 mg | 13%Under-dosed |
| Taurine | 2–3 g | 0.5 g | 25%Under-dosed |
| Potassium (elemental) | 100–400 mg | 280 mg | Hydration support |
- Caffeine (actual caffeine)300 mg100%Clinically effective
- Methylliberine (Dynamine)50 mg50%Under-dosed
- Tetramethyluric Acid (Theacrine)25 mg13%Under-dosed
- Taurine0.5 g25%Under-dosed
- Potassium (elemental)280 mgHydration support
Evidence references
Nutrients · 2023 · n=254
Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis
Scandinavian Journal of Medicine & Science in Sports · 2025 · n=308
Does One Shot Work? The Acute Impact of a Single Taurine Dose on Exercise Performance: A Meta-Analytic Review
