“How long is Hoof Guard good after opening? Are the soy beans cooked? How long is soy oil stable, does it go rancid?”
Answer by Ph.D. Equine Nutritionist, Kelsey Johnson Nonella:
Hoof Guard has a two-year shelf life. The soybeans are cooked and then extruded, making the product fairly stable. The biotin, zinc, methioinine, and MSM is formulated to withstand a shelf life of two years. The bag that Hoof Guard comes in is resealable, reducing oxidation. However, if the product is store in an area where temperature can get very hot the oil can go rancid.