Celebrities like Jessica Simpson are said to be losing weight on the 5 Factor Diet. But will it work east of Beverly Hills?
If you're like most folks, hearing the words "Hollywood" and "diet" in the same sentence leaves you thinking the word "gimmick" can't be far behind. As any serial dieter will tell you, the sheer number of celebrity quick weight loss fixes can make your head spin! Enter stage left: The 5 Factor Diet, the latest weight loss plan reported to help stars like Jessica Simpson, Mandy Moore, Eva Mendes, Alicia Keys, John Mayer, Kanye West, and more get their million-dollar bodies.

But is the 5 Factor Diet, from the book of the same name by celebrity trainer Harley Pasternak, just another Hollywood diet gimmick? Experts are divided on its value.
"I don't see any real science behind the 5 Factor Diet -- no studies to show it works, plus it doesn't seem to address a major problem linked to obesity, which is emotional overeating," says weight control psychologist Abby Aronowitz, PhD, director of SelfHelpDirectives.com.