OPTIMUM NUTRITION Serious Mass Protein Powder Gainer, Chocolate, 2.72kg - [packaging may vary] Purchase Option:10% savings Essential amino acids cannot be

Essential amino acids cannot be made by the body and must be obtained through dietary sources

Represents the Gold Standard for protein quality

has high bioavailability and does not contain any traces of contamination

Don’t miss out on this essential piece—it's more than just a gym jumpsuit

Ideal for women who appreciate both functionality and fashion

OPTIMUM NUTRITION Serious Mass Protein Powder Gainer, Chocolate, 2.72kg - [packaging may vary] Purchase Option:10% savings Essential amino acids cannot beSERIOUS MASS FOR SERIOUS MUSCLE. To gain weight, you need to consume more calories than you expend. For many aspiring to hit their calorie goals and put on size, a highly active metabolism, weak appetite or on the go lifestyle can make it a real challenge to get enough calories from food alone. SERIOUS MASS is the ultimate muscle building and weight gain formula. With 1,250 calories per 2 scoop serving and 50 grams of protein to support muscle