Studies show that stress of all kinds can compromise immune function, which can include heavy training, competition, trailering, or even social changes such as a new pasture mate. If your horse is a senior citizen, hard working or shipped often, this formula contains a potent blend of antioxidants (including Glutathione and Super Oxide Dismutase), bioflavonoids, herbs and additional ingredients that provide support for optimal immune balance that helps the body regulate excessive toxic free radicals and reduce the damaging effects of the oxidative processes.