Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth supplement bottle
Optimum Nutrition

Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth

What We Researched
12 active ingredients analyzed · 8 inactive ingredients decoded · 9 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
70
Product Score Fair
92
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium 130.0 mg 10%
Iron 0.9 mg 6%
Potassium 200.0 mg 4%
Bioavailability Very Good

Absorption Rating

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

Fillers & Additives

  • Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Hydrolyzed Whey Protein)
  • Cocoa Powder (Processed with Alkali)
  • Natural and Artificial Flavor
  • Sunflower and/or Soy Lecithin
  • Creamer (Sunflower Oil, Maltodextrin, Modified Food Starch, Dipotassium Phosphate, Tricalcium Phosphate, Tocopherols)
  • Salt
  • Acesulfame Potassium
  • Sucralose
Efficacy Very Poor

Dosage Analysis

  • Calcium 130.0 mg Under-dosed
  • Iron 0.9 mg Under-dosed
  • Potassium 200.0 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 120.0 Cal †
Total Fat 2.0 g 3%
Saturated Fat 1.0 g 5%
Cholesterol 55.0 mg 18%
Sodium 130.0 mg 6%
Total Carbohydrate 3.0 g 1%
Dietary Fiber 1.0 g 2%
Sugars 2.0 g †
Protein 24.0 g 48%
Calcium 130.0 mg 10%
Iron 0.9 mg 6%
Potassium 200.0 mg 4%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Hydrolyzed Whey Protein) Generally_safe

It is used as a filler and protein source.

Cocoa Powder (Processed with Alkali) Generally_safe

It is used to add color and flavor to the supplement.

Natural and Artificial Flavor Generally_safe

It is used to improve the taste of the product.

Sunflower and/or Soy Lecithin Generally_safe

It is used as an emulsifier to help mix oil and water-based ingredients.

Creamer (Sunflower Oil, Maltodextrin, Modified Food Starch, Dipotassium Phosphate, Tricalcium Phosphate, Tocopherols) Generally_safe

It is used to improve the texture and mouthfeel of the supplement.

Salt Safe

It is used as a flavoring agent.

Acesulfame Potassium Generally_safe

It is used to provide sweetness without adding calories.

Sucralose Generally_safe

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

Price Comparison

Target $29.99 $1.36 / serving
Best Price

Price History

Tracked across major retailers. Updated periodically.

$32$31$30$29$28 $29.99
Target

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

Brand Trust Report
Optimum Nutrition

Founded 1986 · Downers Grove, IL, United States · 95 products · optimumnutrition.com

Certifications

9 certifications
Consumerlab Verified Source
Informed Sport Verified Source
Labdoor Verified Source
Nsf Certified For Sport Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed Source
In House Testing — Verified Source

Violation History

5 incidents
Prop 65 Lead2025-07-21Source
Prop 65 Lead2024-11-22Source
Recall Various nutritional and beverage products2022-07-28Source
Prop 65 Lead2017-03-10Source
Lawsuit Deceptive claims about the plant-based enzyme 'Aminogen' and its effect on protein digestion and absorption.2013Source
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Frequently Asked Questions
Is Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth a good supplement?

Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth received a product quality score of 70/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 12 active ingredients with 22 servings per container. Of the 8 inactive ingredients, 1 are rated safe and 0 are flagged for review. The manufacturer, Optimum Nutrition, holds a brand trust score of 92/100 with 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport.

What are the ingredients in Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth?

Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth contains 12 active ingredients: Calories (120.0 Cal), Total Fat (2.0 g), Saturated Fat (1.0 g), Cholesterol (55.0 mg), Sodium (130.0 mg), Total Carbohydrate (3.0 g), and 6 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth safe to take?

Optimum Nutrition Protein Powder Tub - Chocolate - 1.55lbs: Whey for Muscle Growth 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 Optimum Nutrition a trustworthy supplement brand?

Optimum Nutrition receives a brand trust score of 92/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1986 and headquartered in Downers Grove, IL, United States, the company offers 95 products in their lineup. They hold 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Optimum Nutrition has 5 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.