One of the most popular diets that you will find toady is the Biggest Loser Diet, which is based on the popular television show. The Biggest Loser Diet can only be found online, but it comes with a variety of weight loss tools including a weight tracker, weekly newsletter, and message boards for you to access for peer discussions. With this diet plan, you will receive a customized diet plan that was specifically created for you based on your personal goals and health needs. In addition to the diet, you will also be able to interact with Bob and Jillian, which are the same physical fitness trainers that are on the television program. The best thing about this specific diet plan is that it online costs you $5 a week.