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🚀 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories, 50g of premium protein, and 250g+ carbohydrates per serving. Designed for adults aiming to increase muscle mass and strength, it also includes 20+ essential vitamins and minerals to support overall health and immune function. Ideal for post-workout recovery and customizable to fit your unique nutrition goals.







| ASIN | B0015R6ZPQ |
| ASIN | B0015R6ZPQ |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,906 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #326 in Sales & Deals |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.5 4.5 out of 5 stars (20,188) |
| Date First Available | September 21, 2004 |
| Department | unisex-adult |
| Diet Type | Vegetarian |
| Flavor | Vanilla |
| Global Trade Identification Number | 00748927023008 |
| Item Dimensions | 6.14 x 6.14 x 9.76 inches |
| Item Highlight | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing |
| Item Weight | 0.9 kg |
| Item model number | 1098370 |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1098370 |
| Material Type Free | Caffeine Free |
| Model Name | Optimum Nutrition Serious Mass Weight Gainer Protein Powder Vitamin C Zinc and Vitamin D for Immune Support |
| Model Number | 1098370 |
| Net Content Volume | 11.91 liters |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Benefits | Immune Support, Muscle Growth, Weight Gain |
| Product Dimensions | 6.14 x 6.14 x 9.76 inches; 1.98 pounds |
| Protein | 50 g |
| Protein Source | Whey |
| Recommended Uses For Product | Calorie Increase, Muscle Growth, Post-Workout, Weight Gain |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 8 |
| UPC | 748927023008 748927070040 |
| Unit Count | 96 Ounce |
| Vitamins And Minerals | 0.9, 3.0, 30.0, 5.0, 700.0 milligrams |
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