The C677T MTHFR mutation cause problems converting folic acid into the active bioavailable form methylfolate (or 5-methyltetrahydrofolate). This leads to a buildup of the synthetic folic acid, and thus a folate deficiency at the cellular level.
It is supplements containing the synthetic folic acid, and foods that have the synthetic folic acid added (fortified cereals, etc.) that should be avoided. Foods naturally high in folate (i.e., not fortified) are safe, as the folate is already in a form readily useable by the body.
Treatment for MTHFR is methylfolate (5-methyltetrahydrofolate) and either methylcobolamin or hydroxycobolamin.
Check out mthfr.net
for much more info...
Chronic Lyme, Bart., Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut dysmotility & non-specific inflammation, Lupus, Osteoporosis, etc.; G-Tube; TPN-dependent
Meds: Flagyl, Cefazolin, Zofran, Essential Oils, etc.