Is a Gluten-Free Diet Really Helpful?

Latest diet craze is feeding a multi-billion dollar industry that's facing some questions.
4:41 | 05/20/14

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Transcript for Is a Gluten-Free Diet Really Helpful?
By now you've probably heard about going gluten free the latest Health Grades. Celebrities like Gwyneth Paltrow delegation -- There -- gluten free. Grocery store shelves are -- with gluten free products it's also big business very big. The US gluten free market predicted to reach six point six. Billion dollars by 2017. But what do people really know about Clinton anyway okay. Well luckily and it's Jimmy Kimmel asked some gluten free eaters if they know what gluten is but what is. And this is pretty sad because I don't know it. It is part I believe. The weeks that. Don't know. Answer -- that -- -- -- wheat. Gluten free movement. -- to comment. Vague term it's a good environment due to categorize things that are bad you know calories -- the gluten. Somebody just told you you probably shouldn't include your local Christian who. And and the money -- so. Let's review many celebrities hate. The food industries making billions off of people eliminating gluten from their diets. And yeah. A new study finds that many people who say they are sensitive or intolerant to gluten is probably. Why this is really become a fat. Doctor Suzanne Stein -- as director of women's heart health at Lenox Hill Hospital in New York City. People have grabbed onto the gluten free issue because they think it's healthy but this is a trend and it's gonna leave as quickly as it -- Before it goes let's at least find out. What is gluten well it's a combination of two proteins found in wheat rye Barley and other grains. And many processed foods soups salad dressings and sauces to. And there are people about one in a 133. Who are Baltimore -- with a genetic disorder. Called Celia disease that makes them truly unable to tolerate gluten. Like Elisabeth Hasselbeck. This isn't and I. Specialty training and there isn't just me on here is committed to hang out. Back -- 2012 we talked with Elizabeth and cohost of the view now with Fox News about her struggle with -- -- -- he is going gluten free. And how much better she feels now. Everything from Greg Brown's -- -- -- -- to. Bagels and expand high -- in the air those that are adopting -- four. Fashion trends that -- probably like get -- going to see it and many more -- many thoughts do you think I'd be better off. Reducing or eliminating gluten from my -- I think that if you gave yourself a challenge for you when Winfrey he would pioneering energy levels went so and then you would like how you found to have received -- back. Many people who don't have -- -- disease but say they suffer from gluten sensitivity have gone gluten free and they love it. But that is exactly what the recent study conducted in Australia. Debunks. Researchers gave people -- high gluten diet and a gluten free diet making sure there were no other hard to digest compounds in the food. And it turns out that people who are not diagnosed with -- -- disease but say -- sensitive to gluten. Couldn't tell the difference in a blind test. So if people stopped eating gluten and still feel better are they imagining it. I'm not a 100% sure and keep -- intolerance is -- real thing. I had it myself. I have thousands of patients who have it this -- victims some people are severely intolerant. Some people have -- -- that disease -- them extremely severe intolerant but some people have the money intolerance but they still haven't tolerance. It's real I see it every day in my practice I have to believe my patient. That's what we know now. Is it might not be from the gluten but it actually might be -- short change difficult to digest carbohydrates. So and -- going gluten free taking these carbohydrates out of the diet. People started feeling better. And that began -- fat. But doctors who work with people claiming gluten sensitivity quick -- this new study they say it was too small just 37 people. And they are certain they are treating something real. Sometimes it's hard to know what disease. -- -- -- -- I'm Terry Moran.

This transcript has been automatically generated and may not be 100% accurate.

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