Or should we look at the causes of fatty liver?
Medical professionals have recently published guides to reducing insulin and other diabetes medications for patients on low carbohydrate diets because many of these patients are suddenly getting better. Their improvement and sometimes remission carries a diminishing need for insulin or oral antihyperglycaemics.
The article by Robert Bridge, quoted and linked to inside, speculates on obesity being a factor in the United States' poor performance in the PyeongChang olympic games. It includes a graph of order of obesity in OECD countries. Australia is the fifth highest obesity country. Japan is the lowest.