When it comes to experimenting with ways to eat, there are a lot of choices: The Warrior Diet, the South Beach Diet and the Paleo Diet to name a few. 

For each of these diets there is a group of people that think their plan is best suited for people. But according to sports nutritionist Matt Fitzgerald, most of those diets are a waste of time.

Fitzgerald is the author of the new book "Diet Cults: The Surprising Fallacy at the Core of Nutrition Fads and a Guide to Healthy Eating for the Rest of Us."

He joins the show to talk about the book and to explain why people are seduced by "diet cults."