🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 42% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

6.5 Tbsp Serving Size
30 Servings
Other Combinations Product Type
42% Evidence Coverage

Supplement Facts — Evidence Check

Calories
Total Carbohydrates
Vitamin C
250 mg (417% DV)
30 mg (150% DV)
✅ 2.1× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 30mg UL 35mg
500 mcg (25% DV)
✅ Within RDA (0.4× RDA of 1.3 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 0.5mg UL 100mg
250 mcg (62% DV)
✅ Within RDA (0.6× RDA of 0.4 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 0.25mg UL 1.0mg
35 mcg (583% DV)
📊 14.6× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.035mg
Calcium
30 mg (3% DV)
CarnoSyn
1.6 Gram(s)
1 Gram(s)
📊 Market median: 5.0mg (298 products) 📚 701 studies (Tier A: 5, B: 123)
This product: 1mg
📊 Market median: 500.0mg (143 products)
This product: 1mg
Explosive Energy Blend
425 mg

Other Ingredients

Malic Acid Citric Acid Natural & Artificial flavors Silicon Dioxide Calcium Silicate Sucralose Acesulfame Potassium FD&C Blue #1

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

Product Information

📋 Directions for Use

Suggested use: Take one serving (1 level scoop) of C4 Original, mixed with 6 fl. oz. of water, 20-30 minutes before training. 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 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

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

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

CarnoSyn Carnosine Sythesizer NO3-T Nitrate Technology

Additional Information

Store in a cool, dry place.

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

Customize your C4 experience

ID series The original explosive pre-workout Naturally and artificially flavored 30 servings

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Product Details

UPC / SKU 8 42595 10796 8
DSLD Entry Date 2019-09-24
Product Type Other Combinations
Form Powder
Brand Cellucor
DSLD ID 206338
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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