Gluten-free food is an exploding sector of the grocery industry. It now accounts for more than $10 billion in annual sales in the United States, largely built on ensuring there is no flour in a product.
For some, gluten-free food protects them from health complications related to Celiac disease (though Mayo Clinic estimates less than 2 million Americans actually have the disease). For others, gluten-free food is simply part of healthy eating. You can find all sorts of gluten-free products: pasta, bread, beer, cakes, and even Girl Scout Cookies.
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