

💥 Bulk up smarter, not harder — Serious Mass means serious results!
Optimum Nutrition Serious Mass is a high-calorie, high-protein weight gainer designed for adults aiming to build muscle and increase body mass efficiently. Each serving delivers 1,250 calories, 50 grams of blended protein, and over 250 grams of carbohydrates without added sugar, complemented by creatine, glutamine, and 25 essential vitamins and minerals including immune-supporting Vitamin C, D, and Zinc. Ideal as a post-workout or between-meal shake, it supports muscle recovery, growth, and overall immune health.






| ASIN | B0015R18SU |
| ASIN | B0015R18SU |
| Age Range Description | Adult |
| Allergen Information | Eggs, Hazelnuts, Milk, Peanuts |
| Best Sellers Rank | #2,013 in Health ( See Top 100 in Health ) #98 in Sports Supplements |
| Brand Name | Optimum Nutrition |
| Country of Publication | USA |
| Country of origin | USA |
| Customer Reviews | 4.4 4.4 out of 5 stars (4,240) |
| Customer reviews | 4.4 4.4 out of 5 stars (4,240) |
| Diet Type | Vegetarian |
| Flavor | Banana |
| Global Trade Identification Number | 00748927028867 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions | 39 x 29 x 14 centimeters |
| Item Nype Name | HEALTH_PERSONAL_CARE |
| Item Weight | 2.72 Kilograms |
| Item model number | 1031913 |
| Manufacturer | Optimum Nutrition |
| Manufacturer | Optimum Nutrition |
| Manufacturer Part Number | 1031913 |
| Material Type Free | Caffeine Free |
| Model Name | Optimum Nutrition Serious |
| Model Number | 1031913 |
| Net Content Volume | 11.91 Liters |
| Number of Items | 1 |
| Package Type Name | Bottle |
| Product Benefits | Muscle Growth |
| Product Dimensions | 39 x 29 x 14 cm; 2.72 kg |
| Recommended Uses For Product | Immune Support |
| Total Servings Per Container | 8 |
| Unit Count | 2720 Grams |
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