There's a disease out there you need to know about. It affects some two million Americans, is often misdiagnosed, and is caused by the food you eat.

Jessica Edwards George has Celiac disease and it can be rough. "For me the main thing was abdominal cramping, abdominal pain, fatigue," says Edwards George.

Celiac disease causes the body's immune system to attack its' own digestive tract. It happens when sufferers eat anything containing gluten, which is found in grains like wheat, barley and rye.

Dr. Ciaran Kelly runs the Celiac Center at the Beth Israel Deaconess Medical Center. He says the disease can affect both young and old people, and they usually feel it right in the gut. "Diarrhea, weight loss, abdominal discomfort, bloating," are key symptoms according to Dr. Kelly.

"But then there's another group who may have no intestinal symptoms, but manifest nutritional deficiencies such as iron deficiency with anemia or vitamin D deficiency, causing weakness in the bones and fractures," says Dr. Kelly.

It's a very serious disease and was once thought to be rare. Until recently even a lot of doctors weren't aware of it. As a result, sufferers often had a hard time finding answers, but now, thanks to a simple blood test, the diagnosis is simpler, and we know that the disease is actually quite common.

Dr. Kelly from the Celiac Center says "somewhere on the order of a half to one percent of all Americans, that's over two million people in the United States, have Celiac disease.

What can a sufferer do? "I just completely stopped using gluten," says Jessica Edwards George. That's the solution. Celiacs have to entirely cut out pasta, breads, cakes, cookies and many processed foods.

If it sounds tough, well it is, but as more and more people are diagnosed, the market for gluten free foods is growing, and stores like Whole Foods are stocking their shelves. "We see new customers all the time asking for gluten free products, and I'd say every month there's new products coming out," according to Diana Rodgers of Whole Foods.

Even restaurants like Legal Seafoods are offering gluten free menus, making managing the disease just a little easier. Going gluten-free works. "Now I don't have any health problems," says Edwards George.

It's clear that many people with Celiac disease have not been diagnosed yet. If you have any of the symptoms we've talked about in this report be sure to check with your doctor.