The Inuit spent months in the darkness of Winter, unable to hunt or do real work. Yet, Stefansson observed that they were the healthiest people he had ever seen. He saw virtually no obesity or disease among them. How could this be? Well, Stefansson certainly had his theory.
High Fat Content
Stefansson believed that the high saturated fat content of the Inuit diet (70-80% of total Inuit calories came from Fat) was the mechanism allowing these people to thrive. Stefansson observed that Fat was the most precious dietary input to every Inuit he observed. Upon hunting a Caribou, the Inuit people would savor the Fat deposits behind the eye and jaw, in addition to the organs and shoulder. The leaner parts were fed to the dogs. This caused quite some controversy though.