UltraCruz Equine Vitamin B-12 Supplement for Horses provides vitamin B-12 in a palatable pellet. Vitamin B-12 is the only B-vitamin not produced in plants, so horses rely on their microflora to produce this important vitamin. Vitamin B-12 is widely used to support a healthy appetite and help horses perform at their top level. Our Alfalfa-based pellet is perfect for all classes of horses. Vitamin B-12 plays a key role in the normal functioning of the brain and nervous system, and is involved in the formation of red blood cells.