Health: Allergic to Wheat?

Millions are without knowing it--but a simple test can help you find out

If you come down with celiac disease this week, you might not know it until 2015. It's not that the illness is symptom free. Caused by a severe allergy to gluten (a protein found in wheat and other grains), the disease can cause diarrhea, gas, cramping and weight loss--which is why doctors often mistakingly assume it's irritable bowel syndrome. Or it might show up instead as joint pain, or fatigue, or a skin rash.

No wonder celiac disease is known as the great pretender, and why it takes an average of 11 years to diagnose. An expert panel convened by...

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