Food for thought from 20/20's John Stossel. Is margarine healthier than butter? Should you drink eight glasses of water a day? We'll check out widely-held food beliefs to see if they're fact or fiction. Does sugar make kids hyper? Does expensive coffee taste better? We consulted experts and ran tests. This DVD includes: scene selection, printable version of Educator's guide with pre and post viewing questions, customized activities for each chapter, and web links to Internet resources. .