FROM Kim Severson
Going Gluten-Free: Science or Fiction? Gluten is a protein, which humans have been consuming for some 10,000 years, mainly as a component of wheat. For about 1% of the population, gluten causes celiac disease, which involves stomach problems. But now, some one third of Americans are trying to avoid gluten — so many that gluten-free food has become a multi-billion dollar industry that’s still growing. The gluten-free phenomenon is so much part of the culture that animated series South Park devoted a whole episode to it!