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🚀 Bulk Up Boldly with Serious Mass – Because Gains Wait for No One!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,260 calories, 50g of whey protein, and over 250g of carbohydrates per serving. Enhanced with 25 vitamins and minerals plus creatine and glutamine, it supports muscle growth, immune health, and rapid weight gain. Perfect for professionals committed to serious results, this vanilla-flavored powder blends easily with your favorite calorie boosters for a tailored nutrition boost.














| ASIN | B000GIPJ02 |
| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,647 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #209 in Sales & Deals |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.5 4.5 out of 5 stars (19,963) |
| 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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