Not true. If it was the Eskimos, Inuit and other people who lived in the Arctic circle before modernity encroached there would have been unable to survive. If you’re eating all lean meat you’ll have some kind of deficiency disease inside a month. If you eat fatty meat as well you’ll almost certainly get everything you need and if you eat organ meat as well as muscle and fat we know you can eat that for a year with no ill effects whatsoever.
http://www.mendosa.com/stefansson1.htm
http://inhumanexperiment.blogspot.com/2009/09/two-brave-men-...