“All kinds of people use the 5 Factor Diet,” he says. “I have the largest celebrity client roster in the world – from Eva Mendes, Alicia Keys, Kanye West, Mandy Moore. They’re very busy people. They need something as efficient as possible, much like someone who has a family, a job and responsibilities. This is for the person who doesn’t have a lot of time. It gives results, and that’s important.”

“Even Marge in Wisconsin with three kids working a job can use it. This is for someone limited in time, frustrated and fed up with other fad diets. 5 Factor Diet is the last diet you’ll ever use.”

There’s nothing random about the number five. Research shows that consuming five to six meals a day helps stabilize blood sugar. Harley used the findings to set up a balanced eating regimen of breakfast, lunch, dinner, mid-morning snack and mid-afternoon snack.  He then wrote down the five main components that every meal should be comprised of: low-fat protein, low to moderate GI carbohydrate, fiber, healthy fats and sugar-free beverages. His healthy eating equation includes mouth-watering meals that are sure to satisfy even the most finicky eater.

“Eva Mendes loves the 5 Factor French toast and pizza,” says Harley. “John Mayer is going smoothie crazy and has made some great soup. Entertainers are no different than someone who’s a dental hygienist in Tennessee. What they have in common is that they have a limited amount of time to commit to exercise and eating probably. They all want results and in that way they’re very similar.”

Try Hollywood's Hottest Weight-Loss Plan