There has been a recent boom in the gluten-free market, and much of it has to do with an increase in gluten sensitivity and diagnoses of celiac disease. And it's great that stores are offering more of a selection of foods for people with those conditions.
But recently, doctors have been noticing a rise in the number of people going gluten-free as a lifestyle choice -- namely, to lose weight, much like the reasons some decide to stop eating carbs.
Medically, it’s not really a huge deal because gluten isn't something our bodies need to thrive. I equate it to becoming a vegetarian, because we don't need animal flesh, either -- just the protein it provides. The issue lies within the reasoning behind the gluten-free lifestyle; people are going gluten-free to get thin.