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. Farrier’s Formula® works because it furnishes all the nutrients known to be deficient if there is a problem with hoof growth or hoof quality.