From the all-nighters to the afterparties, C4 Ultimate Energy™ Carbonated is your go-to fuel for social mischief. Packed with 300mg of caffeine, it's designed to keep you energized from working hard to playing hard without skipping a beat. With C4 Ultimate Energy™ Carbonated, you're not just getting hyped—you're playing smart. Formulated with clinically studied BrainBerry® and Cognizin® Citicoline for enhanced cognitive performance and with ZERO grams of sugar or artificial colors, it's the smartest choice you'll make all night. Crack open a can and supercharge your life—day and night—with C4 Ultimate® Carbonated!