UltraCruz Equine Zeolite Silicon Supplement for Horses is a natural source of Silicon, an important element to maintain healthy bones, tendons and ligaments in the horse. Zeolite is a highly bio-available, natural form of Silicon that supports bone and connective tissue health. Performance horses and senior horses may especially benefit from the addition of this high quality, palatable powder. Silicon is the second-most plentiful element on earth, yet horses may not receive adequate amounts from their diets because not all forms of Silica are bioavailable, or readily absorbed by the body.Developed and manufactured in the USA with globally-sourced ingredients by Santa Cruz Animal Health