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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 whey protein, and over 250 grams of carbohydrates with no added sugar, complemented by 25 essential vitamins and minerals plus performance enhancers like creatine and glutamine. Ideal for post-workout recovery and sustained muscle growth, it also supports immune health with Vitamin C, Zinc, and Vitamin D.






| ASIN | B000GIPJ02 |
| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Eggs, Milk, Soy, Wheat |
| Best Sellers Rank | #18,987 in Health ( See Top 100 in Health ) #1,800 in Multiple Vitamin-Mineral Combination Supplements |
| Brand Name | Optimum Nutrition |
| Caffeine Content Description | Caffeine Free |
| Customer Reviews | 4.4 4.4 out of 5 stars (18,171) |
| Customer reviews | 4.4 4.4 out of 5 stars (18,171) |
| Department | GNC|ALL|ALL|NUTRITIONAL SUPPLEMENTS |
| Diet Type | Vegetarian |
| Flavor | Vanilla |
| Is Discontinued By Manufacturer | Yes |
| Item Dimensions | 29.2 x 14 x 40.6 centimeters |
| Item Weight | 192 Ounces |
| Item model number | 1031920 |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1031920 |
| 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 |
| Product Dimensions | 29.21 x 13.97 x 40.64 cm; 5.44 kg |
| Protein Source | Whey |
| Recommended Uses For Product | Post-Workout |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 16 |
| UPC | 748927023824 |
| Unit Count | 5440 Grams |
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