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Best Protein Powder

Cellucor

C4 Whey Protein (C4 Pro Whey)

Cellucor C4 Whey Protein (C4 Pro Whey) is a whey blend protein powder with 25 g of protein per approx. 1 scoop (36 g). It scores 55/100 on the TBPP Quality Score. We found no third-party testing certification.

No third-party testing found
Our score
55/100
Methodology v1.0
Protein
25g
approx. 1 scoop (36 g)
Sugar
1g
Per serving
Protein by weight
69%
Per serving
$1.29
$1.29 per 25 g protein

Nutrition per serving

HERSHEY'S Milk Chocolate flavor, from the label.

Nutrition per serving
Serving sizeapprox. 1 scoop (36 g)
Protein25 g
Calories130
Carbohydrates3 g
Sugar1 g
Fat2 g
Sodium180 mg
Protein by weight69%
LeucineNot verified
BCAAsNot verified

How it scored

55 of 100 points. How we score

CriterionPointsWhy
Protein density14 / 3069% of each scoop is protein
Third-party testing0 / 25No verified independent testing program
Label transparency20 / 20Fully disclosed formula, no amino spiking
Sugar10 / 101 g sugar per serving
Ingredient simplicity6 / 10Mix of natural and artificial flavors or sweeteners
Verified label data5 / 57 of 7 label values verified

Formula and label

Formula and label
TypeWhey Blend
Protein sourcesWhey Protein Concentrate, Whey Protein Isolate
Third-party testingNone found
SweetenersSucralose, Acesulfame Potassium
Proprietary blendNo
Added free amino acidsNo
DietaryNone listed
AllergensMilk
Made byCellucor (Nutrabolt) · USA
Sold atCellucor (direct), Walmart

Price

$35.99–$104.99 for 28 servings (2.22 lb). About $1.29 per serving, or $1.29 per 25 g of protein.

Sizes: 18 servings, 28 servings (2.22 lb), 66 servings (5 lb)

Flavors (3)

  • HERSHEY'S Milk Chocolate
  • REESE'S Peanut Butter and Chocolate
  • Vanilla Bean

Sources

Sold as 'C4 Pro Whey Protein' (earlier labels, and Walmart titles) and 'C4 Whey Protein' (brand site); same formula. Nutrition for HERSHEY'S Milk Chocolate 2.22 lb from NIH DSLD 335112 (entered 2025-07-24, UPC 842595135916, on-market): approx. 1 scoop (36 g), 28 servings, 130 kcal, 2 g fat, 80 mg cholesterol, 180 mg sodium, 3 g carbs, 1 g fiber, 1 g sugars, 25 g protein. Ingredients: whey protein concentrate, whey protein isolate, cocoa, natural and artificial flavors, sunflower lecithin, salt, xanthan gum, sucralose, acesulfame potassium; 'Contains: Milk'. Label carries an 'NSF Contents Certified' seal (not NSF Certified for Sport), so no certification is listed. No amino acid figures on label. Flavors and prices from brand Shopify data 2026-10-14 (28 servings $54.99, 66 servings $104.99); Walmart sells an 18-serving tub at $35.99. Cellucor is a Nutrabolt brand per label.

Good to know

Last checked 2026-10-14. Labels change, so check the package before buying if you have allergies. If you are pregnant, nursing or buying for a child, ask your doctor before adding a supplement.