🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

6.1 Gram(s) Serving Size
60 Servings
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

CarnoSyn
2 Gram(s)
1 Gram(s)
📊 Market median: 2000.0mg (275 products)
Median 2000.0mg This product: 1mg
1 Gram(s)
📊 Market median: 5.0mg (298 products) 📚 701 studies (Tier A: 5, B: 123)
This product: 1mg
200 mg
📊 Market median: 180.0mg (239 products) 📚 43 studies (Tier A: 1, B: 19)
This product: 200mg UL 400mg
📊 Market median: 500.0mg (223 products) 📚 22 studies (Tier A: 0, B: 1)
This product: 200mg
50 mcg
📊 Market median: 0.15mg (41 products)
Median 0.15mg This product: 0.05mg

Other Ingredients

Natural Flavors Silicon Dioxide Malic Acid Calcium Silicate Sucralose Acesulfame Potassium Beet juice powder

Label Claims — Verification

All Other
Structure/Function
All Other (97% of products) Structure/Function (91% of products) Nutrient (29% of products) No Claim (2% of products)

Target Groups

Adult (18 - 50 Years) Women (not pregnant or lactating)

Product Information

📋 Directions for Use

Suggested Use: Take one serving (approx. 1 level scoop) of C4 Extreme mixed with 6 fl. oz. of water, 20-30 minutes before training. Use only as directed.

⚠️ Warnings & Precautions

Some individuals may experience a harmless tingling sensation, which is attributable to Beta-Alanine. Warning: 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. Before taking this product, consult a licensed, qualified, health care professional, especially 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.

Keep out of reach of children.

🧪 Formulation Notes

200 mg caffeine Explosive energy 2g Carnosyn Beta-Alanine Muscular endurance 1g Nitramax (NO3-C) Citrulline Nitrate Nitric oxide booster 1g NO3-T Creatine Nitrate 2 in 1 Creatine & N.O. booster

America's #1 Best-selling Pre-workout brand Explosive pre-workout performance 60 Servings Naturally flavored

No artificial dyes. No artificial flavors. No proprietary blends.

Innovative ingredients. Enhanced formulas.

This product contains caffeine and should not be used in combination with caffeine or stimulants from other sources.

Made in the U.S.A. using strategically sourced domestic and imported ingredients and components.

Additional Information

Follow @Cellucor for giveaways and updates Based on cumulative sales of all C4 branded products from 2010 to the present. C4 Extreme performance id

Project clear evolution Clean. Clear. Evolved.

Clean Clear Fully transparent label. Evolved

Store in a cool, dry place.

This product is sold by weight, not volume. The density of the powder varies, and significant settling of powder may occur during shipping and handling. This product contains the servings indicated when measured by weight.

Product Details

UPC / SKU 8 42595 11224 5
DSLD Entry Date 2020-06-24
Product Type Other Combinations
Form Powder
Brand Nutrabolt
DSLD ID 228809
Data Updated 2026-04-11

Research Evidence

12 Research Sources
45 Avg Quality Score
6 Rct
5 Clinical Trial
1 Meta Analysis
C Effect of food sources of nitrate, polyphenols, L-arginine and L-citrulline on endurance exercise performance: a systematic review and meta-analysis of randomised controlled trials
Meta Analysis Journal of the International Society of Sports Nutrition 2021
C Effects of L-Citrulline Supplementation on Endothelial Function and Blood Pressure in Hypertensive Postmenopausal Women.
Rct Nutrients
C Effects of Acute Citrulline Malate Supplementation on CrossFit® Exercise Performance: A Randomized, Double-Blind, Placebo-Controlled, Cross-Over Study.
Rct Nutrients
C Impact of L-Citrulline Supplementation and HIIT on Lipid Profile, Arterial Stiffness, and Fat Mass in Obese Adolescents with Metabolic-Dysfunction-Associated Fatty Liver Disease: A Randomized Clinical Trial.
Rct Nutrients
C Effect of L-Citrulline Supplementation on NAFLD in Adolescents With Obesity
Clinical Trial ClinicalTrials.gov 2021
C Effects of L-Citrulline or Citrulline-malate on Neuromuscular Performance in Resistance-trained Adults
Clinical Trial ClinicalTrials.gov 2022
C Acute effects of Nitrosigine® and citrulline malate on vasodilation in young adults.
Rct Journal of the International Society of Sports Nutrition
C Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial.
Rct International journal of sports physiology and performance
C Acute effects of combined supplementation of L-arginine and citrulline malate on aerobic, anaerobic, and CrossFit exercise performance.
Rct Scientific reports
C L-Citrulline in Peripheral Artery Disease
Clinical Trial ClinicalTrials.gov 2016
View all evidence for Citrulline →

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