C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate, 2.48 lb (1.13 kg) supplement bottle
C4 / Cellucor

C4® Whey Protein, Reese's Peanut Butter & Chocolate, 2.48 lb (1.13 kg)

What We Researched
15 active ingredients analyzed · 12 inactive ingredients decoded · 3 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
70
Product Score Fair
78
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D 0 mcg 0%
Calcium 140 mg 10%
Iron 1 mg 6%
Potassium 490 mg 10%
Bioavailability Very Good

Absorption Rating

  • Vitamin D Good
  • Calcium Good
  • Iron Fair
  • Potassium Good
Other Ingredients Excellent

Fillers & Additives

  • Whey Protein Concentrate
  • Whey Protein Isolate
  • Partially defatted peanut flour
  • Cocoa powder processed with alkali
  • Natural & Artificial Flavors
  • Potassium Chloride
  • Sunflower Lecithin
  • Salt
  • Xanthan Gum
  • Cellulose Gum
  • Sucralose
  • Acesulfame Potassium
Efficacy Very Poor

Dosage Analysis

  • Vitamin D 0 mcg Under-dosed
  • Calcium 140 mg Under-dosed
  • Iron 1 mg Under-dosed
  • Potassium 490 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 140
Total Fat 2.5 g 3%
Saturated Fat 2 g 10%
Trans Fat 0 g
Cholesterol 80 mg 27%
Sodium 190 mg 8%
Total Carbohydrate 4 g 1%
Dietary Fiber 1 g 4%
Total Sugars 2 g
Includes 0 g Added Sugars 0%
Protein 25 g 50%
Vitamin D 0 mcg 0%
Calcium 140 mg 10%
Iron 1 mg 6%
Potassium 490 mg 10%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Whey Protein Concentrate Generally_safe

It is used as a protein source and to add bulk.

Whey Protein Isolate Generally_safe

It is used as a protein source and to add bulk.

Partially defatted peanut flour Unknown
Cocoa powder processed with alkali Unknown
Natural & Artificial Flavors Generally_safe

It is used to improve the taste of the product.

Potassium Chloride Safe

It is used to provide potassium, an essential mineral.

Sunflower Lecithin Safe

Helps mix oil and water-based ingredients. Allergen-free alternative to soy lecithin.

Salt Safe

It is used as a flavoring agent.

Xanthan Gum Safe

Thickens and stabilizes liquid and semi-solid supplements.

Cellulose Gum Safe

Thickens and stabilizes supplement formulations.

Sucralose Generally_safe

Adds sweetness to chewables, gummies, and powdered supplements without calories.

Acesulfame Potassium Generally_safe

It is used to provide sweetness without adding calories.

Price Comparison

Target $47.99 $1.71 / serving
Best Price
iHerb $51.96 $1.86 / serving

Price History

Tracked across major retailers. Updated periodically.

$53$52$51$50$49 Mar 12 $51.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
C4 / Cellucor

Founded 2002 · Austin, Texas, USA · 60 products · cellucor.com/

Certifications

3 certifications
Health Canada Licensed Verified Source
Nsf Certified For Sport Verified Source
Fda Gmp Inspections Verified Source

Transparency

1 claim

Violation History

6 incidents
Lawsuit A $3 million class-action lawsuit against Nutrabolt regarding the caloric content of its XTEND workout powders was settled.2023Source
Lawsuit A lawsuit was filed alleging that Xtend BCAA supplements do not support muscle growth and recovery. This case was voluntarily dismissed. A separate lawsuit regarding the zero-calorie claims of XTEND powders was settled.2020Source
Prop 65 Lead, Cadmium2018-01-23Source
Lawsuit A lawsuit was filed against Nutrabolt for 'slack-fill' in its Cellucor C4 Pre-Workout powder containers, alleging the packaging was misleading.2018Source
Lawsuit A class-action lawsuit alleged false marketing claims regarding the efficacy of several Cellucor supplements.2016Source
Lawsuit A lawsuit was filed concerning the ingredient DMAA in C4 Extreme, alleging it was a synthetic drug and not a natural dietary supplement.2012Source
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Frequently Asked Questions
Is C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate a good supplement?

C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate, 2.48 lb (1.13 kg) received a product quality score of 70/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 15 active ingredients with 28 servings per container. Of the 12 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, C4 / Cellucor, holds a brand trust score of 78/100 with 3 verified certifications including Health Canada Licensed, Nsf Certified For Sport, Fda Gmp Inspections.

What are the ingredients in C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate?

C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate contains 15 active ingredients: Calories (140), Total Fat (2.5 g), Saturated Fat (2 g), Trans Fat (0 g), Cholesterol (80 mg), Sodium (190 mg), and 9 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate safe to take?

C4 / Cellucor C4® Whey Protein, Reese's Peanut Butter & Chocolate, 2.48 lb (1.13 kg) has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is C4 / Cellucor a trustworthy supplement brand?

C4 / Cellucor receives a brand trust score of 78/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2002 and headquartered in Austin, Texas, USA, the company offers 60 products in their lineup. They hold 3 verified certifications including Health Canada Licensed, Nsf Certified For Sport, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: C4 / Cellucor has 6 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.