Skin and hair are the bodies first line of defense against natural elements. The skin has two layers. The top layer, the epidermis, is primarily dead cells. The underlying dermis contains blood vessels, nerve endings, hair follicles, sweat glands, and sebaceous glands. Super 14 contains polyunsaturated fatty acids plus vitamin E and B12 to promote healthy skin. Also contains zinc combined with amino acids for easy absorption. Sprinkle about 1 tablespoon per animal on feed once a day for healthy skin and wool. Used routinely at Leading university Vet hospitals when zinc supplement is needed or dermatitis exists. 3 lb container.