C4 Smart Energy RTD

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2 reviews
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Break the rules, change the game, and outsmart the competition. Tap into the limitless power of your mind.


Powered by InnovaTea® Natural Caffeine (from Tea), brain-boosting Cognizin® Citicoline, and the additional support of N-Acetyl L-Tyrosine, C4 Smart Energy delivers energy, focus, and mental performance to help you conquer any task—from work to play, gaming to studying, partying to planning.

Smart Energy is proudly made with natural flavors, no artificial colors or dyes, and contains zero calories, sugar, or carbs.


  • 200mg InnovaTea® Natural Caffeine
    Made from green tea, this naturally derived caffeine delivers anytime energy and alertness
  • 250mg Cognizin® Citicoline
    This patented brain-boosting citicoline helps support mental focus, attention, and recall
  • 200mg N-Acetyl L-Tyrosine
    Helps the body produce key neurotransmitters like dopamine to support mood and cognitive health
Customer Reviews
5.0 Based on 2 Reviews
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Tony L.
So Good

The peach mango nectar flavor is delicious and gives a nice boost of energy. Medium carbonation with a ton of delicious peach and mango flavors. A must buy.

Chris E.
Best energy drink!

The caffeine content is where it needs to be and the focus you get from this is next level. Will buy again!

Nutrition Info

Warning Concerning California Residents: This product may contain chemicals known to the State of California to cause cancer and birth defects or reproductive harm.