Well, NAFLD is a real thing and related to NASH.
One issue I have, is that the very first sentence of the abstract is probably incorrect. NAFLD doesn't lead to diabetes, it's the other way around. In the full article, they back away from saying NAFLD causes diabetes and merely says they are related. The biggest problem, is that they used rats, and rats just don't get diabetes, NASH, or NAFLD (or heart disease either, for that fact), so they have to heavily heavily manipulate the rats' genetic background, as well as a ludicrous diet. I'm not saying their study is bad, but just that in a heavily modified animal model system, well... let's not break out the champagne and Noble prizes just yet. What might be more interesting is the chemistry involved to make a "safe" form of DNP. Don't tell the high school girls, they'll all want it!
The title of the Slashdot summary should really be edited to end with "... in rats."