









💥 Bulk smarter, recover faster, and own your transformation!
Optimum Nutrition Serious Mass is a high-calorie weight gainer powder delivering 1,250 calories, 50 grams of blended protein, and over 250 grams of carbs per serving. Enhanced with 25 essential vitamins and minerals plus immune-supporting nutrients and performance boosters, it’s designed for serious muscle growth and recovery. Perfect for post-workout or between meals, this 12 lb vanilla powder is your ultimate ally in building mass efficiently and cleanly.






| Allergen Information | Eggs, Milk, Soy, Wheat |
| Weight | 12 Pounds |
| Units | 5440 Grams |
| Use By Recommendation | Between Meals, After Weight Training & Before Bed |
| Serving Recommendation | One Scoop |
| Brand | Optimum Nutrition |
| Format | Powder |
| Age Range Description | Adult |
| Country of origin | USA |
| Serving Size | 2 scoops, 2 scoops |
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