Optimum Nutrition Serious Mass 3kg

Optimum Nutrition Serious Mass

Serious Mass is our highest-calorie weight gain formula – created specifically to provide maximum macros for athletes with extraordinary muscle and performance goals. Along with carbs for fueling your most intense workouts and calories to help support your bulking diet, the entire 50g of complete protein comes from fast-digesting whey protein concentrate from milk. It’s also a good source of 19 vitamins and minerals and delivers 8g of naturally occurring glutamine per serving.