Celiac/gluten intolerance may just be the tip of the iceberg. What is lurking underneath, unchecked, undiagnosed, could be why you are still sick and tired even after removing your gluten, could be MTHFR. MTHFR is a gene that has the recipe for the enzyme called methylenetetrahydrofolate reductase. The enzyme, in turn, metabolizes B9/Folate into Methylfolate.  Methylfolate…