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💥 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a high-calorie, high-protein weight gainer designed for serious muscle builders. Each serving delivers 1,250 calories, 50 grams of blended protein, and over 250 grams of carbohydrates with no added sugar, complemented by 25 essential vitamins and minerals plus creatine and amino acids to support muscle recovery and immune health. Ideal for post-workout or between meals, it’s the go-to formula for millennials committed to maximizing gains and maintaining peak performance.






| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Eggs, Milk, Soy, Wheat |
| Best Sellers Rank | #1,058 in Health ( See Top 100 in Health ) #382 in Multiple Vitamin-Mineral Combination Supplements |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Caffeine Content Description | Caffeine Free |
| Customer Reviews | 4.4 out of 5 stars 19,483 Reviews |
| Diet Type | Vegetarian |
| Diet type | Vegetarian |
| Flavor | Vanilla |
| Flavour | Vanilla |
| Item Dimensions | 39 x 29 x 14 centimeters |
| Item Weight | 192 Ounces |
| Item weight | 192 Ounces |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1031920 |
| Material Type Free | Finished Product |
| Material type free | Finished Product |
| Model Name | Optimum Nutrition Serious Mass Weight Gainer Protein Powder Vitamin C Zinc and Vitamin D for Immune Support |
| Model Number | 1031920 |
| Net Content Volume | 13.88 Liters |
| Number of Items | 1 |
| Package Type Name | Bottle |
| Product Benefits | High Calorie, High Protein formula for Muscle and Mass Gain Support |
| Protein Source | Whey |
| Recommended Uses For Product | Post-Workout |
| Servings per container | 16 |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 16 |
| UPC | 748927023824 |
| Unit Count | 5440 Grams |
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