What You Need to Know About ON Serious Mass
Serious Mass, pack with 1250 calories & 50g protein formula to gain muscles & size. Recommended between meals or post-workout.
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Products Used In This Article
Optimum Nutrition™
Serious Mass Vanilla
12 lb
A weight gainer for those who want to gain muscle & size.
Optimum Nutrition™
Serious Mass Chocolate
12 lb
A weight gainer for those who want to gain muscle & size
Optimum Nutrition
Serious Mass Chocolate
6lb
A weight gainer for those who want to gain muscle & size
Optimum Nutrition
Serious Mass Vanilla
6 lb
Enhanced with creatine, glutamine and glutamine peptides to support maximum gains in strength and recovery. Vitamins and minerals provide the body with balanced nutrition.
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