Harley Pasternak, MSC, is a renowned fitness and nutrition expert and the bestselling author of The Body Reset Diet, The 5-Factor World Diet, The 5-Factor Diet, and 5-Factor Fitness. He appears regularly on ABC's Good Morning America and has appeared on The View, The Oprah Winfrey Show, The Today Show, Access Hollywood, Extra!, Entertainment Tonight, The Rachael Ray Show, and America's Next Top Model. He blogs for People.com, AOL.com, and the Huffington Post and has been featured in numerous publications. He lives in Los Angeles.