Optimum Nutrition Serious Mass

Serious Mass takes serious calories. You can't grow without fueling your body. Luckily you can get one of the best calories per dollar gainers on the market in a variety of different flavors. Each serving of Optimum Nutrition Serious Mass is 1250 calories and 50g of protein that mixes easily in a shaker or a blender. When you want to pack on the pounds, you'll need the calories!

When To Take Optimum Nutrition Serious Mass

You can take Serious Mass post workout or between meals to boost your calorie intake. 

Who Can Take Optimum Nutrition Serious Mass

Both men & women can take this product.