C4 Energy Natural Zero RTD

C4 Energy Natural Zero RTD

Natural ready to drink pre-workout energy, pump & focus*
Caffeine from Natural Coffeeberry®, naturally flavored & sweetened, no artificial colors or flavors, zero sugar
9.2  out of 10  (5 Reviews)

Product Overview


The future of clean energy is here, and it’s called C4® Energy Natural Zero™. With zero calories, zero sugar, and zero compromises on incredible flavors, C4® Energy Natural Zero™ isn’t just a force to be reckoned with--it’s a force of nature. Naturally sweetened, naturally flavored, and colored with ingredients from natural sources, C4® Energy Natural Zero™ delivers energy for active people everywhere, brought to you America's #1 pre-workout brand.*

Whether you’re working out or heading out, hitting the books or hiking the trails, in the office or in the wild, C4® Energy Natural Zero™ has you covered. With botanical caffeine from Coffeeberry® fruit extract and a brain boost from Cognizin® citicoline, it's the natural choice for zero-calorie, sugar-free energy and focus—good for powering early mornings, late nights, and any moment you need Energy to Perform™.*


  • Natural Energy: Botanical caffeine from Coffeeberry® fruit extract provides clean energy to fuel performance.*
  • Enhanced Focus*: Featuring Cognizin®, a patented citicoline designed to support mental focus, attention, and recall.*
  • Naturally Delicious: Proudly made with natural flavors and sweetened with Stevia. Available in Blueberry Lemonade, Cherry Limeade, and Strawberry Coconut!
  • Performance Ingredients: Also includes l-tyrosine and taurine to support your active lifestyle.*
  • Natural Zero™: Naturally sweetened and naturally flavored. Zero sugar, zero calories, and never any artificial dyes, colors, or preservatives.


At Cellucor®, we've been pioneering, building, and perfecting performance energy products for nearly two decades. For years, the C4® family has led the pre-workout category with explosive energy and performance, the best flavors, clinically studied ingredients, and cutting-edge formulas.*

When we set out to create C4® Energy Natural Zero™, we wanted to create a natural performance energy product that didn't compromise on flavor, ingredients, or results. We spent over 12 months honing the C4® Energy Natural Zero™ formula, rigorously tested and tasted over 15 flavor unique flavor profiles, and tweaked each launch flavor several times to get the feel and flavor of each can dialed in. The result? A delicious, naturally powered performance energy product you can drink with pride.*

  • Incredible Natural Flavors
  • Naturally Sweetened
  • 120mg Natural Caffeine from CoffeeBerry®
  • 250mg Cognizin® Citicoline
  • ZERO Sugar
  • ZERO Carbs
  • ZERO Calories

Ratings & Reviews

C4 Energy Natural Zero RTD
Overall Rating
5 Ratings
Average Flavor Rating
3 Flavors
Top Rated Flavor
Strawberry Coconut
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Sep 05, 2020
  • 10 Blueberry Lemonade

I was selected to recieve a free case of this product. For some reason it never showed up probably due to covid. So I bought a few at the local store. I really enjoyed the flavor with the carbonation. Smooth real taste not that fake flavor you get from other RTD. The main reason i bought this was to have focus and energy while working on the computer. There was a very good clean focus and noi jitters. Cognizin is used for mental focus and clarity and mixed with the right amount of caffeine it really works well. I felt like they dosed this properly and it kept me on task without to much energy where i needed to go for a run.

Sep 04, 2020
  • 8 Cherry Lime

Energy drinks are my typical go-to for an afternoon pick me up and I found I don’t typically need 200 mg of caffeine that often come in energy drinks now, so I really liked having the 120 mg of caffeine in this drink because it was a smooth enough pick me up to keep me productive at work without being too much. I think the Cognizin definitely helps with this focus and productivity that I felt after drinking this. As for the taste, it wasn’t as sweet as you would expect from most energy drinks on the market now. It was a much more subtle cherry lime flavor. While I typically like sweeter energy drinks, this would definitely be good to have on hand for a nice change of pace when I don’t want something so sweet. Even though it wasn’t as sweet as others, it was still very enjoyable and easy to drink, so I definitely will be trying some of the other flavors as well.

Aug 15, 2020

This is a great natural energy drink and easy to drink right before a workout. I really enjoyed the strawberry coconut flavor

Aug 15, 2020
  • 10 Blueberry Lemonade
  • 10 Cherry Lime
  • 10 Strawberry Coconut

These drinks are great! Easy to grab and go, with plenty of flavor and explosiveness to last the entire can and gym session!

Aug 15, 2020
  • 9 Blueberry Lemonade

This is a great all natural alternative to the energy drinks out there. Very clean label and great taste. I didn’t have any energy crash and my focus was on point. I drink one of these every morning before work

1 Size
12 - 12 Fl. Oz. Cans - Carbonated
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3 Flavors
Strawberry Coconut
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Price: $29.99  ($2.50 / Serving)
Flavor Rating: 10


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Caffeine from Natural Coffeeberry®, naturally flavored & sweetened, no artificial colors or flavors, zero sugar

What's in Cellucor C4 Energy Natural Zero RTD

12 - 12 Fl. Oz. Cans - Carbonated Strawberry Coconut
Serving Size 1 Can (12 fl. oz.)
Servings Per Container12
Amount Per Serving
Calories 0       
% DV *
Total Fat 0 g 0%
Sodium 0 mg 0%
Total Carbohydrate 0 g 0%
Total Sugar 0 g 0%
Includes 0g added sugars       
Protein 0 g 0%
Taurine 1,000 mg       
L-Tyrosine 500 mg       
Cognizin® Citicoline 250 mg       
Caffeine (from Coffeeberry® Energy (Coffea arabica) fruit extract) 120 mg       
Not a significant source of saturated fat, trans fat, cholesterol, dietary fiber, vitamin D, calcium, iron and potassium
The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2000 calories a day is used for general nutrition advice.
Carbonated Water, Taurine, Natural Flavors, L-Tyrosine, Malic Acid, Cognizin® Citicoline, Citric Acid, Steviol Glycosides (from Stevia rebaudiana leaf extract), Coffeeberry® Energy (Coffea arabica) fruit extract.

Directions For C4 Energy Natural Zero RTD: Consume one can (12 fl. oz.) of C4® Energy Natural Zero 20-30 minutes before dominated exercise...and/or life.

Warnings: This product is not intended for children, or women who are pregnant or nursing. Please consult a licensed, qualified healthcare professional before consuming this product. Do not consume product if you are sensitive to caffeine, wishing to eliminate caffeine from your diet or in combination with caffeine or stimulants from other sources. Do not freeze. 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.