C4® Ultimate - Icy Blue RazzIcy Blue Razz | GNC

Cellucor® C4® Ultimate


Item # 447855



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Size: 40 Servings

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Note: This product cannot be sold in Canada

Product Information



C4® Ultimate – Icy Blue Razz is for those who are looking for next-level pre-workout powder fueled by clinically studied ingredients. C4® Ultimate brings you AlphaSize®, Zembrin®, Teacrine™ and caffeine for energy, enhanced cognitive performance; and citrulline malate and CarnoSyn Beta Alanine™ to help achieve the ultimate pump and increase carnosine levels.*


  • Features An Ultimate Energy and Focus Blend including 300mg of caffeine and TeaCrine®, which is an alkaloid structurally similar to caffeine that has been clinically studied
  • Contains Citrulline Malate, which may support nitric oxide production, and when paired with arginine, it supports the ultimate pump.
  • Supplies a full clinical dose of CarnoSyn® Beta-alanine to supporting increased carnosine levels, a key muscle function and performance factor.
  • Features AlpahaSize® A-GPC which contains choline, which supports memory function.


Nutrition Facts
Serving Size  1 Scoop
Servings Per Container  40

Amount Per Serving     % DV

Calories 5  

Total Carbohydrate 1g  

Vitamin C (as Ascorbic Acid) 250 mg   417%
Niacin (as Niacinamide) 60 mg   300%
Folic Acid 500 mcg   125%
Calcium (as Calcium Silicate) 45 mg   4%

Vitamin B6 (as pyridoxal-5-phosphate)  1 mg   **
Vitamin B12 (as Methylcobalamin)  70 mcg   **
Citrulline Malate  6 g   **
CarnoSyn® Beta-Alanine  3.2 g   **
Creatine Nitrate (NO3-T®)  1.5 g   **
Betaine Anhydrous  1.5 g   **
Nitrosigine® Inositol-Stabilized Arginine Silicate  1.5 g   **
Arginine Alpha Ketoglutarate  1 g   **
Taurine  1 g   **
C4® Ultimate Energy & Focus Blend  858 mg   **
   N-Acetyl-L-Tyrosine   **
   Theacrine (as TeaCrine®)   **
   AlphaSize® A-GPC (Alpha-Glyceryl Phosphoryl Choline)   **
   Zembrin® (Sceletium tortuosum) aerial parts extract   **
   Rauwolfia vomitoria root bark extract   **
   Huperzine A (from Toothed Clubmoss (Huperzia serrata) aerial parts of extract)   **

** Daily Value (DV) not established.
Other Ingredients
Natural & Artificial Flavor, Polydextrose, Silicon Dioxide, Calcium Silicate , Sucralose, Acesulfame Potassium, FD&C Blue #1
Label (click image to enlarge)

How To Use

Take one serving (1 scoop) of C4® Ultimate, mixed with 10-12 fl. oz. of water 20-30 minutes before training. During your workout, it is recommended that you drink plenty of water or performance beverage such as Cellucor® Alpha Amino to stay hydrated. Some individuals may experience a harmless tingling sensation, which is attributable to beta alanine. USE ONLY AS DIRECTED.
THIS PRODUCT IS ONLY INTENDED FOR HEALTHY ADULTS, 18 YEARS OF AGE OR OLDER. Do not use if pregnant, nursing, currently taking PDE5 inhibitors or nitrates for chest pain. Do not take this product before consulting a licensed, qualified, health care professional if you are taking any other dietary supplement, prescription drug or over-the-counter medication; or if, you suspect you have or have been treated for, diagnosed with or have a family history of, any medical condition. This product contains caffeine and should not be used in combination with caffeine or stimulants from other sources. Discontinue use 2 weeks prior to surgery. Immediately discontinue use and contact a medical doctor if you experience any adverse reaction to this product. Do not use this product continuously for more than 8 weeks. Do not use if safety seal is broken or missing. Store in a cool dry place. KEEP OUT OF REACH OF CHILDREN. This product is sold by weight, not volume. Some settling of powder may occur during shipping and handling, which may affect density of powder. This product contains the servings indicated when measured exactly by weight.
Cellucor® and C4® are trademarks of and distributed by:
3841 S. Traditions Dr. Bryan, TX 77807


4.5 / 5.0
65 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
The Stim and Tingles combined!
I know that i have been opposed to C4 in the past but it sure does more than just wake you up now! Taste is great if you put the maximum amount of water allotted and not entirely a full scoop. 8/10 on my scale.
April 10, 2019
1 week ago
My son and I realize better workouts when we have taken C4 30 minutes prior to our workouts.
April 9, 2019
1 month ago
By far one of my favorite
April 6, 2019
1 month ago
tingles not jitters
Pretty sweet stuff, hit some new PRs on it. Not the best stuff I've ever had, but it's a far cry from their economic blends. If you like to have a large amount of focus, without the jitters this is your medicine. for me the tingles are very light, almost non-existent.
March 29, 2019
1 month ago
C4 is a superior pre-workout supplement
C4 is a superior pre-workout supplement. Flavor is great(blue razz). It gives you a great boost of energy. I compared ingredients with other popular brands and C4 is the best.
March 12, 2019
1 month ago
Awesome taste! No jittery feelings b7t I do have a high tolerance to caffeen.

I'm 5'11" and 205lbs for reference.
March 12, 2019
2 months ago
I love it!
February 26, 2019
2 months ago
Definitely worth it
Best and most reliable PW I have ever had. Can’t go wrong with this money.
February 14, 2019
2 months ago
Too many adverse events for me.
I got use to the severe itching that occurs the first 30 minutes, it’s the having to use the restroom every 10 minutes for the next 4 hours I couldn’t handle. Can’t recommend this product just based on the adverse events.
January 19, 2019
4 months ago
Favorite preworkout to date ??
Absolutely my favorite preworkout, best bump and start feeling the heat 15 minutes in.
January 16, 2019
3 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 9 questions Browse 9 questions and 14 answers
does it cause false positives?
A shopper on Oct 21, 2018
Is this product safe for someone that has to watch their potsssiun intake? I notice it has acesulfame potassium as the artificial sweetener but the label does not give the amount of mg of potassium.
Horror S on Jan 7, 2019
Is this product good for muscle recovery?
Kassy on May 25, 2018
can you buy and pick up?
fernando on Mar 22, 2018
I'm a 56 year old man been lifting weights for 44 year's will this help me put on more muscle ?
Cutup on Feb 26, 2018
BEST ANSWER: It will definitely energise you and provide some nutritional supplements that can help, but it isn’t enough by itself, you’ll need a diet and lifting routine conducive to building muscle for that.
Do you feel like a zombie when the effect goes out and you crash?
A shopper on Sep 28, 2018
BEST ANSWER: I personally have never felt the crash from this c4 ultimate product. I know what you mean though because i experienced it using some other pre work out products.
Yes how fast does the C4 start working?
A shopper on Mar 1, 2018
BEST ANSWER: I started getting results quickly but I also workout everyday for 1 hr to 2 so as long as you put the effort in the results will come
Will use break a fast?
A shopper on Sep 23, 2018
BEST ANSWER: Not as long as you don't drink more than one serving -- only 5 calories.
When should you take this?
A shopper on Feb 21, 2019
BEST ANSWER: Definitely take as recommended, or slow sip it from before workout until mid-workout.