We analyze the most popular diet plans in America today. Diet plans, programs, books and advertisements are everywhere. There are so many diet plans in existence, it can be difficult to select just one. It can be extremely challenging to research effective diet plans and select the one that is right for you.What are the trendiest diets? Which diets are the most popular? What diet plans are the most effective? To find some answers, we analyzed search volume, data from Google Trends.