The Weight of the Nation, a four-part documentary series, premieres May 14 and 15, only on HBO.

Bringing together the nation’s leading research institutions, THE WEIGHT OF THE NATION is a presentation of HBO and the Institute of Medicine (IOM), in association with the Centers for Disease Control and Prevention (CDC) and the National Institutes of Health (NIH), and in partnership with the Michael & Susan Dell Foundation and Kaiser Permanente.