The Celiac Disease Foundation one-third depends on how you go gluten-free 18 million Americans 18 million Americans source 18 million Americans autoimmune disorder one percent Celiac.org depends on how you go gluten-free 1% of the population that has celiac disease depends on how you go gluten-free 1% of the population that has celiac disease The Celiac Disease Foundation 18 million Americans The Celiac Disease Foundation approximately 1% The Celiac Disease Foundation 18 million Americans The Celiac Disease Foundation one percent of Americans have celiac disease According to the Celiac Disease Foundation 18 million Americans about 1% of the population 18 million Americans about 1% of the population 18 million Americans celiac disease celiac millions of people according to the Celiac Disease Foundation. The Celiac Disease Foundation one in 100 people have celiac disease one percent of the population The Celiac Disease Foundation