Optimum Nutrition Serious Mass
Optimum - Mass Gainer
A mass gainer will give you additional calories and nutrients in a delicious drink to increase your weight. Each serving of this shake will give you a massive 1250 calories.
To get the same amount of calories you would need to eat 3 hamburgers and a pack of chips!
Because you drink this product you can easily increase the amount of calories by adding in extra ingredients like a Banana, Peanut Butter or some Granola.
Size and Muscle
Every serving will give you 50 grams of quality protein to increase muscle. Protein is a vital nutrient responsible for the muscle building process.