At first I thought this ad was some kind of vintage jokey, but following the breadcrumb trail of links from Pinterest revealed that it is in fact the real deal.
According to Celebrity culture and the American Dream (I think it’s a book): “While ads in the 1920s warned women that they would be lonely if they were too heavy, many Depression-era ads chided women who were too thin. Advertisement from the August 1935 issue of Motion Picture courtesy of University of Southern California Cinematic Arts Library”
Haha! Love it!