CytoSport, Inc. | 5,085 followers on LinkedIn. CytoSport, Inc. is among the most trusted and recognized sports nutrition and functional beverage companies in the United States. As the maker of MUSCLE MILK®, MONSTER MILK® and CYTOMAX® brands, we’re dedicated to providing premium protein products that elevate everyday performance for every body. Our portfolio serves the needs of elite athletes, active lifestylists and weekend warriors with a wide-range of innovative protein-enhanced solutions that taste great and appeal to evolving consumer demands.