C4 Ultimate Energy® — 300mg Caffeine Performance Energy Drink | 16oz, 12-Pack

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C4 Ultimate Energy® — 300mg Caffeine Performance Energy Drink | 16oz, 12-Pack

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The strongest can in the C4 lineup. 300mg of caffeine, zero sugar, zero artificial colors — built for the days when a normal energy drink isn't going to cut it.The Strongest Can Cellucor MakesC4 Ultimate Energy sits at the top of the C4 beverage lineup for one reason: 300mg of caffeine per 16oz can. That's 50% more than standard C4 Performance Energy, and it's the version people reach for when the 200mg can stopped registering — early lifts, double shifts, long drives, and training days that started rough.Zero sugar. Zero artificial colors. Carbonated, cold, and ready to open — no shaker, no scoop, no clumping at the bottom of the bottle.What 300mg of Caffeine Actually DoesCaffeine doesn't manufacture energy. It works by blocking adenosine — the molecule that accumulates in your brain across the day and signals fatigue. Caffeine occupies those receptors so the fatigue signal never lands, which is why perceived effort drops and output holds longer. At 300mg, you're in the range used in most performance research on caffeine and training capacity, roughly what a 200lb lifter would take pre-session.That's also why this can isn't for everyone. If 200mg already has you jittery, start with C4 Performance Energy instead. Ultimate is the step up, not the starting point.The Performance Ingredients Behind the CaffeineWhat separates C4 Ultimate from a standard energy drink is what rides alongside the stimulant — the same amino profile Cellucor built its pre-workout reputation on:CarnoSyn® Beta-Alanine — a precursor to muscle carnosine, which buffers the hydrogen ions that accumulate during hard sets. More buffering capacity means fatigue arrives later in the set. Benefits are tied to consistent daily use, not a single can. The tingling you may feel on your face and hands is paresthesia — harmless, and a signal the beta-alanine is in there.L-Citrulline — converts to arginine in the kidneys more efficiently than arginine taken directly, feeding nitric oxide production and vasodilation. Practically: better blood flow to working tissue and a fuller pump.BetaPower® Betaine Anhydrous — an osmolyte that pulls water into the muscle cell, supporting cellular hydration under training stress.N-Acetyl-L-Tyrosine — a precursor to dopamine and norepinephrine. Under stress, your brain burns through catecholamines; tyrosine restocks the raw material, which is why it pairs with high-stimulant formulas for focus rather than scattered energy.Vitamin B12 — a required cofactor in energy metabolism, converting food into usable ATP.Tri-stim energy. Beyond caffeine, C4 Ultimate has historically included TeaCrine® (theacrine) and Dynamine™ (methylliberine) — compounds structurally similar to caffeine that hit different receptor timing. The result is a longer, flatter energy curve instead of a spike-and-crash, which is why the can doesn't feel like it's tapering at the 90-minute mark.C4 Ultimate vs. C4 Performance: Which CanC4 Performance Energy (200mg) — daily driver. NSF Certified for Sport, which matters if you're drug tested. Good for most training sessions and general use.C4 Ultimate Energy (300mg) — heavy days, early mornings, and anyone with a built stimulant tolerance. Not a first energy drink.How to Use ItDrink one can 20–30 minutes before training. That's the window where plasma caffeine peaks. Because caffeine has a half-life of roughly 5–6 hours, half of that 300mg is still circulating five hours later — so if you train in the evening and value your sleep, move this can earlier in the day.Do not combine with other caffeinated products. Not intended for anyone under 18, or for those who are pregnant or nursing.Why Buy It From Coalition NutritionWe've been stocking specialty supplements out of Langhorne since 2014 — every can here comes through legitimate distribution, stored properly, and dated. If you're not sure whether Ultimate or Performance is the right call for your tolerance, ask us. That's the part Amazon can't do.C4 Ultimate Energy — FAQHow much caffeine is in C4 Ultimate Energy?300mg per 16oz can. That's the highest caffeine content in the C4 beverage lineup — 100mg more than C4 Performance Energy.Is C4 Ultimate stronger than regular C4?Yes. Standard C4 Performance Energy contains 200mg of caffeine per can. C4 Ultimate contains 300mg, along with a more aggressive supporting stimulant profile. If you're new to high-caffeine products, start with C4 Performance.Can I use C4 Ultimate as a pre-workout?Yes — that's what it's built for. Drink one can 20 to 30 minutes before training. It contains the same category of performance ingredients found in powdered pre-workouts, in a ready-to-drink carbonated format.Does C4 Ultimate have sugar?No. Zero sugar, zero calories, and no artificial colors or dyes. It's sweetened with sucralose and acesulfame potassium.Why do I feel tingling after drinking it?That's paresthesia from beta-alanine — a harmless, temporary skin sensation, usually across the face, neck, and hands. It fades within 30 to 60 minutes and is not a sign of an allergic reaction.Is C4 Ultimate NSF Certified for Sport?No. C4 Performance Energy carries NSF Certified for Sport certification; C4 Ultimate does not. If you compete in a tested federation or organization, choose C4 Performance instead.How many cans come in a pack?Twelve 16oz cans per case.*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Read more

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The strongest can in the C4 lineup. 300mg of caffeine, zero sugar, zero artificial colors — built for the days when a normal energy drink isn't going to cut it.

The Strongest Can Cellucor Makes

C4 Ultimate Energy sits at the top of the C4 beverage lineup for one reason: 300mg of caffeine per 16oz can. That's 50% more than standard C4 Performance Energy, and it's the version people reach for when the 200mg can stopped registering — early lifts, double shifts, long drives, and training days that started rough.

Zero sugar. Zero artificial colors. Carbonated, cold, and ready to open — no shaker, no scoop, no clumping at the bottom of the bottle.

What 300mg of Caffeine Actually Does

Caffeine doesn't manufacture energy. It works by blocking adenosine — the molecule that accumulates in your brain across the day and signals fatigue. Caffeine occupies those receptors so the fatigue signal never lands, which is why perceived effort drops and output holds longer. At 300mg, you're in the range used in most performance research on caffeine and training capacity, roughly what a 200lb lifter would take pre-session.

That's also why this can isn't for everyone. If 200mg already has you jittery, start with C4 Performance Energy instead. Ultimate is the step up, not the starting point.

The Performance Ingredients Behind the Caffeine

What separates C4 Ultimate from a standard energy drink is what rides alongside the stimulant — the same amino profile Cellucor built its pre-workout reputation on:

CarnoSyn® Beta-Alanine — a precursor to muscle carnosine, which buffers the hydrogen ions that accumulate during hard sets. More buffering capacity means fatigue arrives later in the set. Benefits are tied to consistent daily use, not a single can. The tingling you may feel on your face and hands is paresthesia — harmless, and a signal the beta-alanine is in there.
L-Citrulline — converts to arginine in the kidneys more efficiently than arginine taken directly, feeding nitric oxide production and vasodilation. Practically: better blood flow to working tissue and a fuller pump.
BetaPower® Betaine Anhydrous — an osmolyte that pulls water into the muscle cell, supporting cellular hydration under training stress.
N-Acetyl-L-Tyrosine — a precursor to dopamine and norepinephrine. Under stress, your brain burns through catecholamines; tyrosine restocks the raw material, which is why it pairs with high-stimulant formulas for focus rather than scattered energy.
Vitamin B12 — a required cofactor in energy metabolism, converting food into usable ATP.

Tri-stim energy. Beyond caffeine, C4 Ultimate has historically included TeaCrine® (theacrine) and Dynamine™ (methylliberine) — compounds structurally similar to caffeine that hit different receptor timing. The result is a longer, flatter energy curve instead of a spike-and-crash, which is why the can doesn't feel like it's tapering at the 90-minute mark.

C4 Ultimate vs. C4 Performance: Which Can

C4 Performance Energy (200mg) — daily driver. NSF Certified for Sport, which matters if you're drug tested. Good for most training sessions and general use.
C4 Ultimate Energy (300mg) — heavy days, early mornings, and anyone with a built stimulant tolerance. Not a first energy drink.

How to Use It

Drink one can 20–30 minutes before training. That's the window where plasma caffeine peaks. Because caffeine has a half-life of roughly 5–6 hours, half of that 300mg is still circulating five hours later — so if you train in the evening and value your sleep, move this can earlier in the day.

Do not combine with other caffeinated products. Not intended for anyone under 18, or for those who are pregnant or nursing.

Why Buy It From Coalition Nutrition

We've been stocking specialty supplements out of Langhorne since 2014 — every can here comes through legitimate distribution, stored properly, and dated. If you're not sure whether Ultimate or Performance is the right call for your tolerance, ask us. That's the part Amazon can't do.

C4 Ultimate Energy — FAQ

How much caffeine is in C4 Ultimate Energy?

300mg per 16oz can. That's the highest caffeine content in the C4 beverage lineup — 100mg more than C4 Performance Energy.

Is C4 Ultimate stronger than regular C4?

Yes. Standard C4 Performance Energy contains 200mg of caffeine per can. C4 Ultimate contains 300mg, along with a more aggressive supporting stimulant profile. If you're new to high-caffeine products, start with C4 Performance.

Can I use C4 Ultimate as a pre-workout?

Yes — that's what it's built for. Drink one can 20 to 30 minutes before training. It contains the same category of performance ingredients found in powdered pre-workouts, in a ready-to-drink carbonated format.

Does C4 Ultimate have sugar?

No. Zero sugar, zero calories, and no artificial colors or dyes. It's sweetened with sucralose and acesulfame potassium.

Why do I feel tingling after drinking it?

That's paresthesia from beta-alanine — a harmless, temporary skin sensation, usually across the face, neck, and hands. It fades within 30 to 60 minutes and is not a sign of an allergic reaction.

Is C4 Ultimate NSF Certified for Sport?

No. C4 Performance Energy carries NSF Certified for Sport certification; C4 Ultimate does not. If you compete in a tested federation or organization, choose C4 Performance instead.

How many cans come in a pack?

Twelve 16oz cans per case.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.