Description
SERIOUS MASS by OPTIMUM NUTRITION 12 lb Optimum Nutrition's Serious Mass may be the weight-gainer to end all weight-gainers. If you're looking for a fast, affordable and easy way to pack on the calories, you're in luck. With an unbelievable 1,250 calories per serving, one shake's worth of Serious Mass could feed a small village. OK, not really, but Optimum Nutrition wasn't kidding around when they named this weight gain powder Serious Mass. It's not a product for everyone, but for those looking to beef up their calorie intakes without spending all day at the table, Optimum Nutrition's high calorie supplement for weight gain is the gold standard of gainers.