Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Jul 17, 2012
Gluten free diets have become a fast-growing food trend in the United States. According to a recent market survey, sales of products that do not include the grain-based protein exceeded $6.2 billion last year. VOA's June Soh looks at what gluten is and why foods without it have become so popular.