Hello, still researching on where to order tests. I found a website, direct labs, where I can order tests, and take the actual order to the lab near my home, in this case a labcorp, for testing. It sounds reasonable. They offer two different tests for celiac. One is the Tissue Transglutaminase Antibody Assay (tTG) and the other is the Anti-gliadin Antibody Assay (AGA). Can anyone help determine which test would be better? thanks in advance

tTG.

Have them do a complete panel, that would include both. If cost demands only one then do go with the Ttg. Do keep in mind though that the blood test does have false negatives, as does the biopsy so when you finish all your testing try the diet, strictly to see if it helps.

Total IgA
Ttg IgA
Ttg IgG
EMA (less accurate, but 100% specific for celiac)
Total blood count/chemistry

I'm newly diagnosed (Aug 8 to be exact!) but here is what the University of Chicago Celiac Center says about testing:
"Which is the correct Screening Test?
Anti-Tissue Transglutaminase (tTG-IgA) -- A screening test is commonly used when an individual is in a risk group for Celiac Disease, whether or not he/she has symptoms. This test is usually the one offered for Celiac screening events, as it is the most sensitive test available. "

it lists other tests as well, and gives an explanation
here is a link to their website
http://www.celiacdisease.net/testing

Hope that helps, I know it can be overwhelming with all the information out there.