Vita Flex Pro Equinyl Joint Forumla with Hyaluronic Acid Supplement for Horses Advanced joint health formula for extreme performance demands. Hyaluronic Acid is added to provide additional joint support for flexibility and healthy joints. Vita Flex's ComfortX horse supplement ingredient may reduce inflammation associated with training and competition, provides joint health support, increases flexibility and shortens recovery time by reducing the emigration of neutrophils to the site of the inflammation. No gastrointestianl side effects 30 day supply, 1.9 pounds