Description
Optimum Nutrition Serious Mass is the gold standard in weight gainers. If you are a “hardgainer” or someone with a fast metabolism, you know how difficult it can be to consume enough calories to pack on size. Serious Mass provides a massive calorie boost in a convenient, delicious shake, making it easier than ever to hit your daily caloric surplus goals for muscle growth.
High-Calorie Support for Mass Building
Building muscle requires both protein and a significant amount of energy. Serious Mass provides the ideal balance, fueling your body with the high-quality carbohydrates and proteins necessary for massive gains. It is not just about calories; it is about providing the right nutrients to ensure that the weight you gain is supported by the muscle mass you are training so hard to develop.
Why Choose Optimum Nutrition Serious Mass?
Optimum Nutrition is a world-renowned leader in sports nutrition. Serious Mass is a scientifically developed formula that includes vitamins, minerals, and glutamine to support your body while you grow. It is perfect for athletes who need a reliable, high-calorie source of fuel that doesn’t compromise on quality. It mixes easily, tastes great, and provides the sustained energy you need for long, grueling workouts.
How to Use for Best Results
For the best results, mix 1-2 scoops of Serious Mass with 600-700ml of cold water or milk. Shake well until fully dissolved. For maximum weight gain, consume one serving between meals, after your workout, or before bed. To further support your mass-building journey, we recommend pairing this with our creatine supplements to boost your training intensity.
At MF Labs, we pride ourselves on providing only the most effective supplements to our customers. To see our full range of mass-building fuel, please check out our mass gainer collection. We ensure that every product we sell meets high-quality standards to help you reach your size and strength goals faster.

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