EquiShield SA is a powdered equine supplement built around quercetin, methylsulfonyl methane (MSM), vitamin E and sodium hyaluronate, along with ground stabilized flaxseed and rice bran. Quercetin functions as a natural antihistamine that helps support normal histamine levels in the skin, while MSM is included to help support reduced skin inflammation. Sodium hyaluronate helps maintain skin moisture and flexibility, and vitamin E together with rice bran provides antioxidant support against free radical exposure. Ground stabilized flaxseed is added to help support a balanced immune response to common environmental allergens. The powder is intended to be mixed into a horse's regular grain ration once daily using the scoop included in the container. It is formulated specifically for equine use and is not labeled for other species.