Will a gluten-free diet improve your health?

"Within a week of eliminating [gluten], I started to feel markedly better," says Cooper, now 36, from Melbourne, Australia. "It wasn't a gradual feeling better; it was almost a crossing-the-street kind of thing." ... "There is a tight definition of celiac disease, but gluten intolerance has been a moving target." That was 10 years ago. The general practitioner who treated Cooper was ahead of his time, as most doctors are only now starting to realize that some people who don't have celiac disease may benefit from diets free of (or low in) gluten.... Experts now think of gluten intolerance as a spectrum of conditions, with celiac disease on one end and, on the other, what's been called a "no man's land" of gluten-related gastrointestinal problems that may or may not overlap....