Optimum Nutrition (On) Serious Mass Weight Gain Powder - 3 Lbs 1.36 Kg (Vanilla)
SERIOUS MASS is the ultimate weight gain and muscle building formula. With approximately 1,250 calories per 2-scoop serving and 50 grams of protein to support muscle recovery, this powder makes the ideal post-workout and between meals shake for sizing up your goals. SERIOUS MASS provides you with the tools you need to support your weight gains goals. It is a health supplement.