UltraCruz Equine Trace Mineral Supplement for Horses is a source of key ingredients that help support overall horse health. Minerals are essential for muscle contraction, nerve impulse conduction, and proper growth and development. During perspiration, essential minerals such as electrolytes are secreted and must be replaced in order to maintain proper fluid balance. The rapid consumption of minerals in the body depends on conditions such as growth rate and activity level.Developed and manufactured in the USA with globally-sourced ingredients by Santa Cruz Animal Health