Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Vitamin C, Zinc and Vitamin D for Immune Support, Chocolate, 12 Pound (Packaging May Vary)

Serious Mass is a high-calorie weight gain formula from Optimum Nutrition, designed to help you achieve your sizable ambitions.

With Calories That Count, you can supercharge your serious mass gains using an electric blender and add nuts, fresh or frozen fruits, and other calorie-contributing ingredients.

Whether you're between meals, after weight training, or before bed, Serious Mass provides the optimal usage occasions for maximum results.

Don't settle for mediocrity - choose Optimum Nutrition's Serious Mass to help you get serious about your weight gain goals.