Mass Gainer

Build muscle mass quicker with the Decathlon mass gainer, working with high-quality protein, you’ll be able to find the right ratio of carbs, fats and protein that works for you. Whether you want to build or maintain your muscle mass, find your supplement below.
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Mass Gainer

Working with high-quality protein, you’ll be able to find the right ratio of carbs, fats and protein that works for you whatever sport you practice. Whether you want to build or maintain your muscle mass following your hard work in the gym, or strengthen your left hook for your next boxing session in the ring, our selection is designed to help optimise your performance and maintain the fitness progress you've been working hard to build.