He performed new research involving 37 participants who met criteria for non-celiac gluten sensitivity. The participants cycled through various diets, serving as their own controls. The results did not match that of Gibson's first study. This time, he found that people reported painful symptoms after each meal, whether it was gluten-free or not. 

Participants complained of gastrointestinal symptoms, regardless of the diet they ate, suggesting that symptoms might be psychological. Of course, others argue that the condition is real. Whatever the case, the trend is not likely to fade anytime soon. People are becoming more and more concerned about what they eat, the ingredients in their food and how those foods make them feel. Thirty percent of people express a desire to reduce their dietary gluten, according to NPD Group, a market research company. 

What to Do If You Think You Have Problems Digesting Gluten 

If you suspect that you have a gluten intolerance based on the symptoms listed above, the common reaction is to remove gluten from your diet. But don't be in such a hurry to solve the problem on your own that you may overlook a more serious issue. 

According to Dr. Stefano Guandalini, the director of the University of Chicago Celiac Disease Center, getting tested is the first step in getting an accurate diagnosis. "If you think you might have celiac disease, the biggest mistake is to begin a diet without being tested," Guandalini told WebMD. If you experience symptoms, see a doctor to get tested before going gluten-free. The difference in symptoms between celiac disease and gluten intolerance is subtle. You can't be sure if you have one or the other without being tested.