When a baby is born by cesarean section, she misses out on Mom's microbes in the birth canal. Sarah Small/Getty Images hide caption

toggle caption Sarah Small/Getty Images

Gluten is everywhere you look in Italy. Here, fresh ravioli at the historic shop "Gatti & Antonelli" in Rome in 2014. Alberto Pizzoli/AFP/Getty Images hide caption

toggle caption Alberto Pizzoli/AFP/Getty Images

An FDA rule effective Aug. 5 states that foods may be labeled "gluten free" only if there's less than 20 parts per million of the protein. James Benet/iStockphoto hide caption

toggle caption James Benet/iStockphoto

More and more gluten-free beers are entering the marketplace. We asked a librarian with celiac disease for her list of favorites. Bill Chappell/NPR hide caption

toggle caption Bill Chappell/NPR

Students at the University of Washington used a protein-folding program initially funded by the Defense Advanced Research Projects Agency to come up with a treatment for celiac disease. DARPA hide caption

toggle caption DARPA

NPR thanks our sponsors

Become an NPR sponsor