Over 25 years of equine nutritional research, clinical trials and field testing have gone into every cup of Farrier's Formula®. While no single nutrient is the key to a healthy hoof, studies show that most horses with hoof problems respond to better overall nutrition. Farrier's Formula® provides lecithin, DL- methionine, ascorbic acid, copper, zinc, biotin, and other nutrients that allow the horse's liver and hoof corium to build and assemble a highly crosslinked hoof wall that is denser and more resistant to cracking or drying out.