Gwyneth paltrow, miley cyrus, they've gone gluten-free. even oprah tried giving up gluten for a cleansing diet. gluten is a protein that's found in wheat and other grains, in foods like pasta and bread. >> if you are gluten intolerant, you end up spending half of your dinner looking for gluten-free items on the menu. >> gluten-free foods and diet books, they are now part of a $6 billion industry. but is the fuss worth it? dr. larry sperling wanted to know. >> to my knowledge, unless you have true gluten sensitivity, there's nothing magical about a gluten-free diet. >> one point to make clear, ...