Optimum Nutrition Serious Mass™, Strawberry, 6 lb (2.72 kg) supplement bottle
Optimum Nutrition

Serious Mass™, Strawberry, 6 lb (2.72 kg)

What We Researched
29 active ingredients analyzed · 7 inactive ingredients decoded · 9 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
72
Product Score Fair
92
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin A (as Vitamin A acetate) 340 mcg 38%
Vitamin C (as sodium ascorbate) 30 mg 33%
Vitamin E (as d-alpha tocopheryl acetate) 4 mg 27%
Thiamin (as thiamin hydrochloride) 0.4 mg 33%
Riboflavin 0.9 mg 69%
Niacin (as niacinamide) 4 mg 25%
Vitamin B6 (as pyridoxine hydrochloride) 0.4 mg 24%
Folate (as folic acid) (100 mcg folic acid) 170 mcg DFE 43%
Vitamin B12 (as cyanocobalamin) 1.65 mcg 69%
Biotin (as d-biotin) 60 mcg 200%
Pantothenic Acid (as d-calcium pantothenate) 3 mg 60%
Calcium (as calcium carbonate, dicalcium phosphate) 700 mg 4%
Iron (as ferrous fumarate) 6 mg 33%
lodine (as potassium iodide) 23 mcg 15%
Magnesium (as magnesium phosphate) 140 mg 33%
Zinc (as zinc oxide) 3 mg 27%
Copper (as copper gluconate) 0.4 mg 44%
Manganese (as manganese amino acid chelate) 0.4 mg 17%
Potassium 950 mg 20%
Creatine Monohydrate 5 g **
Bioavailability Very Good

Absorption Rating

  • Vitamin A (as Vitamin A acetate) Good
  • Vitamin C (as sodium ascorbate) Good
  • Vitamin E (as d-alpha tocopheryl acetate) Good
  • Thiamin (as thiamin hydrochloride) Fair
  • Riboflavin Good
  • Niacin (as niacinamide) Good
  • Vitamin B6 (as pyridoxine hydrochloride) Fair
  • Folate (as folic acid) (100 mcg folic acid) Fair
  • Vitamin B12 (as cyanocobalamin) Fair
  • Biotin (as d-biotin) Good
  • Pantothenic Acid (as d-calcium pantothenate) Good
  • Calcium (as calcium carbonate, dicalcium phosphate) Fair
  • Iron (as ferrous fumarate) Fair
  • lodine (as potassium iodide) Good
  • Magnesium (as magnesium phosphate) Good
  • Zinc (as zinc oxide) Poor
  • Copper (as copper gluconate) Good
  • Manganese (as manganese amino acid chelate) Good
  • Potassium Good
  • Creatine Monohydrate Good
Other Ingredients Excellent

Fillers & Additives

  • Maltodextrin
  • Whey Protein Concentrate
  • Natural and Artificial Flavor
  • Sunflower and/or Soy Lecithin
  • Red 40 Lake Low
  • Acesulfame Potassium
  • Sucralose
Efficacy Poor

Dosage Analysis

  • Vitamin A (as Vitamin A acetate) 340 mcg Under-dosed
  • Vitamin C (as sodium ascorbate) 30 mg Under-dosed
  • Vitamin E (as d-alpha tocopheryl acetate) 4 mg Under-dosed
  • Thiamin (as thiamin hydrochloride) 0.4 mg Under-dosed
  • Riboflavin 0.9 mg Under-dosed
  • Niacin (as niacinamide) 4 mg Under-dosed
  • Vitamin B6 (as pyridoxine hydrochloride) 0.4 mg Under-dosed
  • Folate (as folic acid) (100 mcg folic acid) 170 mcg DFE Under-dosed
  • Vitamin B12 (as cyanocobalamin) 1.65 mcg Under-dosed
  • Biotin (as d-biotin) 60 mcg Effective
  • Pantothenic Acid (as d-calcium pantothenate) 3 mg Under-dosed
  • Calcium (as calcium carbonate, dicalcium phosphate) 700 mg Effective
  • Iron (as ferrous fumarate) 6 mg Under-dosed
  • lodine (as potassium iodide) 23 mcg Under-dosed
  • Magnesium (as magnesium phosphate) 140 mg Under-dosed
  • Zinc (as zinc oxide) 3 mg Under-dosed
  • Copper (as copper gluconate) 0.4 mg Under-dosed
  • Manganese (as manganese amino acid chelate) 0.4 mg Under-dosed
  • Potassium 950 mg Effective
  • Creatine Monohydrate 5 g Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 1260
Total Fat 5 g 6%*
Saturated Fat 3 g 15%*
Cholesterol 200 mg 63%
Total Carbohydrate 252 g 92%*
Total Sugars 30 g **
Includes 8 g Added Sugars 16%*
Protein 50 g 100%*
Vitamin A (as Vitamin A acetate) 340 mcg 38%
Vitamin C (as sodium ascorbate) 30 mg 33%
Vitamin E (as d-alpha tocopheryl acetate) 4 mg 27%
Thiamin (as thiamin hydrochloride) 0.4 mg 33%
Riboflavin 0.9 mg 69%
Niacin (as niacinamide) 4 mg 25%
Vitamin B6 (as pyridoxine hydrochloride) 0.4 mg 24%
Folate (as folic acid) (100 mcg folic acid) 170 mcg DFE 43%
Vitamin B12 (as cyanocobalamin) 1.65 mcg 69%
Biotin (as d-biotin) 60 mcg 200%
Pantothenic Acid (as d-calcium pantothenate) 3 mg 60%
Calcium (as calcium carbonate, dicalcium phosphate) 700 mg 4%
Iron (as ferrous fumarate) 6 mg 33%
lodine (as potassium iodide) 23 mcg 15%
Magnesium (as magnesium phosphate) 140 mg 33%
Zinc (as zinc oxide) 3 mg 27%
Copper (as copper gluconate) 0.4 mg 44%
Manganese (as manganese amino acid chelate) 0.4 mg 17%
Sodium 680 mg 30%
Potassium 950 mg 20%
Creatine Monohydrate 5 g **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Whey Protein Concentrate Generally_safe

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

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.

Red 40 Lake Caution

It is used to add color to the supplement.

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

Price History

Tracked across major retailers. Updated periodically.

$59$58$57$56$55 Mar 12 $57.34
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
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
Related Supplements
Frequently Asked Questions
Is Optimum Nutrition Serious Mass™, Strawberry a good supplement?

Optimum Nutrition Serious Mass™, Strawberry, 6 lb (2.72 kg) received a product quality score of 72/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 29 active ingredients with 8 servings per container. Of the 7 inactive ingredients, 0 are rated safe and 1 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 Serious Mass™, Strawberry?

Optimum Nutrition Serious Mass™, Strawberry contains 29 active ingredients: Calories (1260), Total Fat (5 g), Saturated Fat (3 g), Cholesterol (200 mg), Total Carbohydrate (252 g), Total Sugars (30 g), and 23 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Optimum Nutrition Serious Mass™, Strawberry safe to take?

Optimum Nutrition Serious Mass™, Strawberry, 6 lb (2.72 kg) has been analyzed for ingredient safety across all its components. Of 7 inactive ingredients, 0 are rated safe. 1 ingredient is flagged for review: Red 40 Lake. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. 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.