
C4 Ultimate
|Up to 300mg Caffeine|6g L-Citrulline
Product Guide
Adjustable 150–300mg caffeine for energy
6g L-citrulline supports workout pumps
4.8g CarnoSyn supports muscular endurance
Tyrosine and choline support focus
Magnesium supports normal muscle function
B vitamins support energy metabolism
One or two scoop flexibility
Built for demanding training sessions

Why
C4 Ultimate is a strong choice for customers who want a performance-focused pre-workout but also value control over stimulant strength. The ability to move between 150mg and 300mg caffeine makes the formula more adjustable, while the full serving combines this with 6g L-citrulline and a substantial 4.8g dose of CarnoSyn® beta-alanine rather than depending on stimulants alone.
When
Before demanding resistance training, high-intensity workouts or other sessions where additional energy, concentration and training performance are particularly useful. Its adjustable serving also makes it easier to match the formula to the intensity of that day's workout rather than automatically taking the maximum amount every time.
Who
C4 Ultimate is best suited to regular pre-workout users who want an adjustable but potentially high-stimulant formula. The full 2-scoop serving contains 300mg caffeine, making it particularly appropriate for experienced users comfortable with stronger stimulant products, while the 1-scoop option provides a lower 150mg caffeine serving. It is not a suitable choice for people looking to avoid caffeine or stimulants.