<<Disclaimer: Verify this information before applying it to your situation.>> I had a few questions for some of the people who contributed to the question of "Do we need vitamins?". My main question is how do people know they are deficient? Is there a test that covers most all of the basic vitamin levels? My secondary question is this: what are the sources for the individuals who are pretty certain that a celiac's absorbtion level will stay low even after staying on a GF diet. Where are they getting this information? I found this area very interesting and would like to pursue this with our doctor. Thanks! (I picked out a few of the responses from the summary that pertained to my questions.) ...... I have been gf for a year ... my absorption level is still a little on the low side. ...... The general concensus is we need to take vitamins to catch up and to cover anything we are not absorbing well. After 3 years I still don't absorb fats right, so all of the fat soluable vitamins (A,E,K) are an unknown..... ....... No. You will never absorb nutrients like people that aren't celiac, you might the fat but not the vitamins and the trace elements. ....... Depends on the state of your gut....celiacs suffer from leaky gut which leads to malabsorption. My nuttrionist told me to take one LGlutamine capsule and one acidophilus capsule with each meal. This will heal the gut, but you will need to take it on a regular basis forever. ....... Yes, you need an external source of vitamins. That's the short version. The longer version is that you will probably never again absorb vitamins at the same level you did before becoming CD. ....... People with cd will always have problems with malabsorption of vitamin and minerals. That is why it is important that we supplement. Jenny Cronin Shorewood,Il