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🚀 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,260 calories, 50g of whey protein, and 250g+ carbohydrates per serving, enhanced with 25 vitamins and minerals including immune-supporting Vitamin C and Zinc. Ideal for adults seeking serious muscle growth and weight gain, this vanilla-flavored powder supports post-workout recovery and daily calorie needs with a trusted formula favored by fitness enthusiasts.














| ASIN | B000GIPJ02 |
| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #2,089 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #268 in Sales & Deals |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.5 4.5 out of 5 stars (19,973) |
| Date First Available | May 27, 2004 |
| Department | GNC|ALL|ALL|NUTRITIONAL SUPPLEMENTS |
| Diet Type | Vegetarian |
| Flavor | Vanilla |
| Item Dimensions | 11.5 x 5.5 x 16 inches |
| Item Weight | 12 pounds |
| Item model number | 1031920 |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1031920 |
| 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 | 1031920 |
| Net Content Volume | 13.88 liters |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Benefits | Immune Support, Muscle Growth, Weight Gain |
| Product Dimensions | 11.5 x 5.5 x 16 inches; 12 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 | 16 |
| UPC | 748927023824 |
| Unit Count | 192 Ounce |
| Vitamins And Minerals | 0.9, 3.0, 30.0, 5.0, 700.0 milligrams, 100, 100, 28, 63, 80 percent_daily_value_fda |
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