DZD researchers have made an astonishing discovery: the reason is related to the metabolism of these "at-risk slim individuals". Professor Nobert Stefan reported about this discovery on the HR TV program "alles wissen".
Link to the broadcast (in German) from November 16, 2017
DZD Researcher on HR TV “Slim yet Diabetic”
DZD News
[Translate to Englisch:] Prof. Norbert Stefan mit Patientin. Quelle: hr / Screenshot