I'd heartily recommend digging into Dr Michael Eades' blog.
Watch the vid, read his analysis, and delve into the comments. A good example of how mainstream/CW media covers these issues. The anti-fat bias is ever present. If you can spend a half hour each morning reading "random posts" from Eades' blog, you will really get an education. He dissects studies, exposes the bias, exposes poor/flawed/outright lies in media coverage of same studies. The guy is a genius.
That above link should bring you an "aha" and his posts will help you see through the smoke and mirrors.