Oats

Oats are considered to be gluten free.  The contamination
issue can be avoided by using oats that are labeled certified
gluten free.
Before introducing gluten free oats, Celiac disease should be
well controlled on a gluten free diet.  Oats add fiber and
nutrition to the diet.  Due to the fiber content, they may
cause gas and a change in stool pattern.  These symptoms
should resolve over time.