According to UCSF's Lustig from "Sugar: The Bitter Truth" video in Lionhearts post it's because they don't consume hardly any fructose.<p>I do believe though that urban Chinese and Japanese are experiencing the same health issues we are here due to increased fructose consumption.<p>Traditional Inuit diets consist of 0 carbohydrates and is very high in fat. They had very low levels of obesity, heart disease and diabetes being unknown.