









💥 Bulk Up Smart, Recover Faster, Stay Strong!
Optimum Nutrition's Serious Mass is a 12 lb vanilla-flavored weight gainer designed for serious muscle builders. Each serving delivers 1,250 calories, 50 grams of blended protein, and over 250 grams of carbs with zero added sugar. Enhanced with 25 essential vitamins and minerals plus Creatine and Glutamine, it supports muscle growth, recovery, and immune health—perfect for adults aiming to bulk up efficiently.






| 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 |
| Serving Size | 2 scoops, 2 scoops |
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