“…The influence of factors other than the diet of the animal (such as genetics and breeding) on the content of iron in meat is also unexplained. In contemporary literature there is no information about the losses of the most valuable nutrients in beef as a result of culinary processes (Driskell et al, 2011;Florek, Litwińczuk, Kędzierska-Matysek, Grodzicki, & Skałecki, 2007;Gerber, Scheeder, & Wenk, 2009;Leheska et al, 2008;Leonhardt & Wenk, 1997;Lombardi-Boccia, Lanzi, & Aguzzi, 2005;Reykdal, Rabieh, Steingrimsdottir, & Gunnlaugsdottir, 2011). However, there is a very high diversity of published data related to the nutritional value of beef due to differences in the meat researched, the genotype of animals, the feeding method, the content of various nutrients in the environment, various techniques of slaughter, and postslaughter processing, sampling, and from the selection of analytical techniques (Kerry & Ledward, 2009;Lawrie, 2006;Pisula & Pośpiech, 2011).…”