As more Americans adopt gluten-free diets, some are facing criticism that gluten-free is a fad promoted by food companies to make money. Late-night TV hosts have derided the trend toward gluten-free dieting, and some celiac disease patients say they are frequently mocked. “I’m embarrassed when I say that I’m allergic to gluten, because I feel like people are rolling their eyes: ‘Just another one, part of the fad,’ ” said Glutie Foodie blog author Shira Kraft, who has celiac disease. The Washington Post (tiered subscription model) (r.smartbrief.com) (7/6)