🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 17% of ingredients have research evidence
B Label Compliance Grade

Product Label

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Label Data

20.6 Gram(s) Serving Size
20 Servings
Other Combinations Product Type
17% Evidence Coverage

Supplement Facts — Evidence Check

Calories
5 Calorie(s)
Total Carbohydrates
1 Gram(s) (1% DV)
Vitamin C
250 mg (417% DV)
Calcium
100 mg (10% DV)
Sodium
60 mg (3% DV)
📊 Market median: 2000.0mg (275 products)
Median 2000.0mg This product: 7mg
CarnoSyn
3.2 Gram(s)
3 Gram(s)
📊 Market median: 5.0mg (298 products) 📚 701 studies (Tier A: 5, B: 123)
This product: 3mg
📊 Market median: 496.0mg (192 products) 📚 20 studies — no high-quality reviews
This product: 1.5mg
P6 Testosterone Technology
1.325 Gram(s)
1 Gram(s)
📊 Market median: 500.0mg (180 products) 📚 5 studies (Tier A: 0, B: 1)
This product: 1mg
C4 Ultimate Energy & Focus Blend
758 mg

Other Ingredients

Calcium Silicate Silicon Dioxide Natural & Artificial flavors Sucralose Salt Acesulfame Potassium Polydextrose Cinnamon Caramel FD&C Red #40

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult Male (18-50 Years)

Product Information

📋 Directions for Use

Suggested use: Take one serving (1 level scoop) of C4 Ultimate Power, mixed with 10-14 fl. oz. of water 20-30 minutes before training. For best results, use for 8 weeks in conjunction with a resistance training program. Some individuals may experience a harmless tingling sensation, which is attributable to Beta-Alanine. Use only as directed.

⚠️ Warnings & Precautions

Some individuals may experience a harmless tingling sensation, which is attributable to Beta-Alanine. Use only as directed.

Warning: This product is only intended to be consumed by healthy, adult men, 18 years of age or older.

Not for use by women, especially those who are pregnant or nursing. Do not use this product if 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, including but not limited to: high or low blood pressure, diabetes, anxiety, cardiovascular, psychiatric or seizure disorders, cardiac arrhythmia, stroke, heart, liver, kidney, or thyroid disease, or difficulty urinating due to prostate enlargement. This product contains caffeine and Sceletium tortuosum (Zembrin) and should not be used in combination with other products containing caffeine or Sceletium tortuosum (Zembrin) or stimulants from other sources, including but not limited to, coffee, tea, soda, or other dietary supplements and medications.

Do not use this product continuously for more than 8 weeks. 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 if the safety seal is broken or missing.

Keep out of reach of children.

Contains: Milk.

🧪 Formulation Notes

Some individuals may experience a harmless tingling sensation, which is attributable to Beta-Alanine.

Warning: This product is only intended to be consumed by healthy, adult men, 18 years of age or older.

This product contains caffeine and Sceletium tortuosum (Zembrin) and should not be used in combination with other products containing caffeine or Sceletium tortuosum (Zembrin) or stimulants from other sources, including but not limited to, coffee, tea, soda, or other dietary supplements and medications.

Energy Caffeine, TeaCrine, Rauwolfia Extract Pumps Citrulline Malate, Citrulline Nitrate (NO3-T) Endurance CarnoSyn Beta-Alanine Focus Huperzine-A, Zembrin, Caffeine

The clinically studied and patented ingredient found within our leading P6 Testosterone support products - KSM-66 Ashwagandha extract has been shown to support improvements in muscle size, strength and natural testosterone levels in healthy adult males. In addition to our P6 Testosterone Technology, C4 Ultimate Power contains 7g of our Citrulline Performance Complex, which provides 6g Citrulline Malate + 1g Citrulline Nitrate (NO3-T) to amplify pumps and support Nitric Oxide. Finally, we've included two sources of advanced creatine to help support muscle cell water volume, which helps promote muscle contractile force.

TeaCrine KSM-66 Ashwagandha CarnoSyn Carnosine Synthesizer NO3-T Nitrate Technology Zembrin BetaPower Natural Betaine AlphaSize ElevATP Strenght. Power. Performance.

Contains: Milk.

Additional Information

Store in a cool, dry place.

Some settling of powder may occur during shipping and handling, which may effect density of powder. This product contains the servings indicated when measured exactly by weight. Made in the U.S.A. using strategically sourced domestic and imported ingredients and components.

Follow @Cellucor for giveaways & updates @Cellucor Facebook @Cellucor Twitter @Cellucor Instagram

Formulated for power

P6 Testosterone, strength & power C4 Ultimate Power is our most explosive pre-workout enhanced with our P6 Testosterone Technology to promote Testosterone, Strength & Power.

C4 Ultimate Power is formulated specially for those looking to dominate the gym, the competition, and anything else standing in their way. Embrace the power and never look back.

Testosterone technology The most powerful testosterone & strength pre-workout Naturally & artificially flavored 20 servings

Product Details

UPC / SKU 8 42595 10842 2
DSLD Entry Date 2019-09-24
Product Type Other Combinations
Form Powder
Brand Cellucor
DSLD ID 206353
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
148 Meta Analysis
82 Systematic Review
71 Rct
62 Clinical Trial
2 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Other
1 Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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