Serious Mass backinstock and a whey protein blend

and a whey protein blend of isolate

and L-carnosine

With ascorbic acid

High Protein Content

and intense pre-workout routines

Serious Mass backinstock and a whey protein blendOptimum Nutrition Serious Mass is a high quality Weight Gainer with the following main features: Weight gain Supports calorie intake for effective Weight gain Muscle building High protein content promotes muscle growth and regeneration Energy supply Complex carbohydrates provide long lasting energy Performance enhancement Additional creatine can improve physical performance during intense training Serious Mass is especially suitable for athletes and