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David, Folic Acid is indeed advisable for a Celiac.  Many Celiacs have
low iron absorption caused by a lack of folic acid.  I would suggest
finding out if this is for you to anyone who wants to try it though..
there are folic acid and iron blood tests availiable.

         Julie May -- Manager of Resources, Orbital OnLine Services
       WEB page = http://www.online.edmonton.ab.ca/~jmay/index.html
         Running both Celiac and Environmental Illness WEB pages.