“We know people are eating a lot of junk food, but to have almost one-third of Americans’ calories coming from those categories is a shocker. It’s no wonder there’s an obesity epidemic in this country,” Block said in a statement.

So said Gladys Block, a professor of epidemiology and public health nutrition at the University of California, Berkeley, in the June issue of the Journal of Food Chemistry and Analysis, according to this story. Why it took a study to figure this out is unclear.