Read an excerpt of "The Best Life Guide to Managing Diabetes and Pre-Diabetes." Nov. 9, 2009— -- Bob Greene, best known as Oprah Winfrey's personal trainer, is tackling the topic of diabetes ...

Oprah was at her heaviest weight when she met Greene during a last-ditch attempt to get a handle on her diet; over 30 years, Greene has helped her heal her relationship with food and handle her ...