Acti-Flex Powder by Cox Labs is the alfalfa-based powder version of the Acti-Flex 4000 Liquid. It contains the same key ingredients to support the join function of your horse. While Acti-Flex Powder works to fight inflammation and pain, it also supports long term protection to knees, backs, stifles, hocks, fetlocks and other cartilage. It helps to prevent much of the cumulative cartilage damage that eventually shortens the animal’s prime performance years.