As we started cooking more brisket, the fat seemed like such a waste --I mean, it cost just as much as the meat.   After researching a lot, we were able to render much of the fat and cook the additional trimmings for dog food.  Rendering beef fat into pure tallow takes a lot of time, but when you look at all of the products that can be made, it is a great investment of time and effort.  Aside from being an excellent oil for cooking, the tallow makes a healthy base for soaps, balm, chapstick, deodorant, and sunscreen.  Some benefits of tallow for skin are Vit A, D, E, K, Linoleic acid an omega-6 fatty acid, antioxidant, anti-inflammatory, antibacterial, increases collagen production, mimics human skin barrier chemical makeup, and non-comedogenic so it does not clog pores.