C4 Smart Energy is Cellucor's focus-forward energy drink — fight back morning grogginess and midday slumps with 200mg of natural caffeine from green coffee beans, paired with Cognizin® Citicoline, a clinically studied nootropic that supports mental focus, attention, and recall. Rather than leaning on caffeine alone the way many energy drinks do, C4 Smart Energy is clinically studied to elevate focus, concentration, recall, mental multi-tasking, and gaming performance, adding N-Acetyl Tyrosine (a soluble form of L-Tyrosine that supports noradrenaline and dopamine) and a Niacin, Potassium, and Vitamin B12 complex on top of the caffeine base. Designed to fuel your goals mentally and physically, C4 Smart Energy is also positioned to accelerate calorie burning, boost metabolism, and support fat loss when combined with a calorie-reduced diet and active lifestyle. Zero sugar, zero calories, zero carbs, no artificial colors or dyes. Available in 8 flavors — Icy Blue Razz, Black Cherry, Strawberry Guava, Tropical Passionfruit, Blood Orange Yuzu, Cherry Berry Lime, Watermelon Burst, and Peach Mango Nectar.†
Nutrition Facts — C4 Smart Energy Drink (Per 1 Can / 12 fl oz)
Caffeine: 200mg (natural, from Green Coffee Bean Extract)
Zero sugar, zero calories, zero carbs
Key Nutrients: Potassium, Niacin, Vitamin B12
Active Ingredients
Cognizin® Citicoline — clinically studied ingredient that supports mental focus, attention, and recall
N-Acetyl-L-Tyrosine — soluble form of L-Tyrosine that supports noradrenaline and dopamine, in turn supporting mental health during stressful activities
Ingredients
Carbonated Water, Citric Acid, Potassium Citrate, Cognizin® Citicoline, Natural Caffeine (from Green Coffee Bean Extract), Potassium Benzoate (preservative), Natural Flavors, Sucralose, Acesulfame Potassium, Niacinamide, N-Acetyl-L-Tyrosine, Sodium Citrate, Cyanocobalamin (Vitamin B12)
No artificial colors or dyes
Flavors: Icy Blue Razz, Black Cherry, Strawberry Guava, Tropical Passionfruit, Blood Orange Yuzu, Cherry Berry Lime, Watermelon Burst, Peach Mango Nectar
Sold as single cans and 12-packs, including variety packs
California Prop 65 Warning applies.
Cognizin® Citicoline — Built on Clinical Research, Not Just Caffeine
While many energy drinks rely on stimulants, C4 stands out by pairing caffeine with brain-health ingredients to deliver clean, sustained mental energy. Cognizin® Citicoline (from Kyowa Hakko) is a brain-health ingredient with strong published evidence for enhancing focus, mental energy, and cognitive performance — a cornerstone of C4 Smart Energy's formulation. Citicoline is an intermediate in the biosynthesis of phosphatidylcholine, a major phospholipid component of cell membranes, and has documented research on supporting brain energy metabolism and neurotransmitter function relevant to attention and recall.†
N-Acetyl-L-Tyrosine — A More Soluble Focus Precursor
N-Acetyl-L-Tyrosine is a soluble form of L-Tyrosine — the amino acid that serves as the direct precursor to dopamine and norepinephrine, the catecholamines central to focus, alertness, and drive, particularly under stress. The acetylated form is chosen specifically for improved water solubility in a beverage format compared to standard L-Tyrosine, which has more limited solubility, making it a more practical inclusion for a ready-to-drink can.†
200mg Natural Caffeine — From Green Coffee Bean Extract
C4 Smart Energy sources its caffeine naturally from Green Coffee Bean Extract (branded as InnovaTea® in some marketing materials, though ingredient panels confirm Green Coffee Bean Extract as the source) rather than synthetic Caffeine Anhydrous. At 200mg, this sits in the moderate-to-substantial range for an energy drink — enough for genuine alertness and focus support without reaching the more aggressive 300mg+ doses found in C4 Ultimate or other high-stim energy products.†
C4 Smart Energy vs. C4 Performance vs. C4 Ultimate — Choosing Your C4
C4 has three distinct energy drink lines, each formulated for a different priority. C4 Performance Energy (200mg caffeine) centers on Beta-Alanine, L-Citrulline, and Betaine for pump and endurance — the pre-workout-leaning option. C4 Ultimate Energy (300mg caffeine) uses a Tri-Stim blend of Caffeine, TeaCrine, and Dynamine for maximum stimulant intensity. C4 Smart Energy (200mg caffeine, covered here) is the focus-first option, built around Cognizin Citicoline and N-Acetyl-Tyrosine rather than pump ingredients or additional stimulants — positioned as much for work, study, and gaming as for the gym.†
Frequently Asked Questions
Is C4 Smart Energy the same as C4 Ultimate?
No — these are two separate C4 RTD lines. C4 Ultimate delivers 300mg caffeine via a Tri-Stim blend (Caffeine, TeaCrine, Dynamine). C4 Smart Energy delivers 200mg caffeine paired with Cognizin Citicoline and N-Acetyl-Tyrosine specifically for cognitive focus rather than maximum stimulant intensity.†Can C4 Smart Energy actually help with fat loss?
C4 Smart Energy is positioned to accelerate calorie burning, boost metabolism, and support fat loss specifically in combination with a calorie-reduced diet designed for weight loss and an active lifestyle — it's a supportive tool alongside those factors, not a standalone fat-loss solution.†Is C4 Smart Energy good for studying or work, not just the gym?
Yes — this is one of its primary positioning angles. The Cognizin Citicoline and N-Acetyl-Tyrosine combination is specifically marketed for focus during work, gaming, studying, and general daily mental performance, not exclusively pre-workout use.†Is C4 Smart Energy appropriate for tested athletes?
Based on the disclosed formula — Caffeine, Cognizin Citicoline, N-Acetyl-L-Tyrosine, Niacin, Potassium, and Vitamin B12 — C4 Smart Energy does not appear to contain compounds prohibited by WADA or NCAA. Tested athletes should review the complete label as standard practice.†
How to Enjoy C4 Smart Energy Drink
Crack open a can and enjoy — no preparation required. Suitable anytime energy and focus are needed: work, study, gaming, or before training. Monitor total daily caffeine intake from all sources — generally recommended to stay within 400mg daily for most healthy adults. Not intended for individuals under 18, pregnant or nursing women, or those sensitive to caffeine. Consult a physician before use if taking any prescription medications or having any medical condition. California Prop 65 Warning applies.†
Why Buy at Get Yok'd
Real-time inventory across all five Southern California stores
Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
Authorized Cellucor/C4 retailer — carrying C4 Smart Energy alongside C4 Performance Energy, C4 Ultimate Energy, and the full C4 pre-workout lineup
Staff who can tell you which C4 Smart Energy flavors are currently in stock
One of the best loyalty programs in the supplement industry — earn rewards on every purchase
Who Should Exercise Caution with C4 Smart Energy Drink
Not intended for individuals under 18 years of age
Not for pregnant or nursing women
Not recommended for individuals sensitive to caffeine
Not for individuals with cardiovascular conditions or high blood pressure without physician clearance
Monitor total daily caffeine intake from all sources when combining with other caffeinated products
Consult a physician before use if taking any prescription medications or having any medical condition
California Prop 65 Warning applies.
Keep out of reach of children.
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.