This Celiac.com FAQ on celiac disease will guide you to all of the basic information you will need to know about the disease, its diagnosis, testing methods, a gluten-free diet, etc.
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What are the major symptoms of celiac disease?
Celiac Disease Symptoms
What testing is available for celiac disease? - list blood tests, endo with biopsy, genetic test and enterolab (not diagnostic)
Celiac Disease Screening
Interpretation of Celiac Disease Blood Test Results
Can I be tested even though I am eating gluten free?
How long must gluten be taken for the serological tests to be meaningful?
The Gluten-Free Diet 101 - A Beginner's Guide to Going Gluten-Free
Is celiac inherited? Should my children be tested?
Ten Facts About Celiac Disease Genetic Testing
Is there a link between celiac and other autoimmune diseases?
Celiac Disease Research: Associated Diseases and Disorders
Is there a list of gluten foods to avoid?
Unsafe Gluten-Free Food List (Unsafe Ingredients)
Is there a list of gluten free foods?
Safe Gluten-Free Food List (Safe Ingredients)
Gluten-Free Alcoholic Beverages
Distilled Spirits (Grain Alcohols) and Vinegar: Are they Gluten-Free?
Where does gluten hide?
Additional Things to Beware of to Maintain a 100% Gluten-Free Diet
What if my doctor won't listen to me?
An Open Letter to Skeptical Health Care Practitioners
"...standard, a competitive ELISA, may indicate gluten values <20 mg/kg, which is deemed safe for people with celiac disease. However, in this study, LC-MS analyses revealed gluten peptides derived from hydrolysed fragments, many >30 kDa in size. Barley gluten (hordeins) were detected in all beers analysed with peptides representing all hordein classes detected in conventional beers, but also alarmingly in many gluten-reduced beers...."
More than just iron is needed to correct anemia. Several B vitamins, copper and vitamin A are needed, too, and are often low in newly diagnosed Celiacs. Celiac Disease causes malabsorption which results in malnutrition. Supplementation may be necessary until the body heals enough to absorb nutrients better. Checking for vitamin and mineral deficiencies might be a good idea.
Hope this helps.