Optimum Nutrition | Serious Mass Gainer Protein Powder - 5.45Kg Vanilla Gain Supplement Optimum Nutrition | Vanilla | Vanilla | Need Serious Weight? Get On Serious Mass ! Serious Mass: The Ultimate In Weight Gain Formulas. Serious Mass Supplies You With The Tools You Need To Pack On The Pounds And Develop The Physique You\'ve Always Wanted. Other Benefits Of Supplementing With Optimum Nutrition\'s Serious Mass Include: • Adding Calories Has Never Been This Easy Or Tasted So Good • 1, 250 Calories • 50 G Of Blended Protein • Over 250 G Of Carbohydrates With No Added Sugar • Enhanced With Creatine, Glutamine, And Glutamine Peptides • 25 Vitamins And Essential Minerals | Serious Mass Gainer Protein Powder - 5. 45Kg Vanilla