We are proud to present the Optimum Nutrition Serious Mass mass building product. Serious Mass is the most advanced muscle mass building product with a specially reduced amount of sugar. By consuming Serious Mass, you will get the necessary amount of proteins, carbohydrates, trace elements and calories necessary for muscle growth.

Every ingredient in Serious Mass is there for the sole purpose of helping you gain muscle mass quickly. Anyone who has tried it will agree that it is a true mass-building masterpiece, containing the most advanced protein formula, consisting of two types of whey proteins: whey protein and egg albumin. This protein formula is special in that it quickly supplies the muscles with "building" materials.

In Serious Mass , sugar is replaced with higher-quality carbohydrates, which will prevent you from gaining unnecessary fat mass.

Each serving of Serious Mass contains as much as 25 grams of protein and 125 grams of carbohydrates. The carbohydrate matrix consists of polysaccharides and crystalline fructose, which provide the body with energy, which allows you to train more intensively and for longer, and your muscles will grow faster. B vitamins will help muscles overcome fatigue and reduce stress. It also contains creatine, taurine, L-glutamine, vitamins and minerals.