mthfr.net has a wealth of information about
these gene mutations.
Having MTHFR gene mutations does not necessarily change one's B12 blood level, and in fact may cause the B12 and Folate blood levels to be higher than normal.
This is because MTHFR gene mutations impair the body's ability to convert folic acid to methyl-folate (biologically active folate), and to then use this methyl-folate and vitamin B12 in the production of glutathione.
Glutathione is a most important substance for everyone, and especially for those of us with Lyme/coinfections. Glutathione is a strong antioxidant (protects cells from oxygen free radical damage; free radicals are generated as a result of normal metabolic activity in the body, and also as a result of immune system activity when it is fighting infections).
Glutathione also is needed to detoxify metabolic byproducts, heavy metals, environmental toxins, and Lyme/coinfection toxins/die-off.
Being heterozygous for 1 MTHFR gene is not as serious as being homozygous for 2 MTHFR genes, but both cases can require nutrition support - in the form of methyl-folate (5-methyltetrahydrofolate) and methyl-B12 and/or hydroxy-B12.
Heterozygous = only one of 2 copies of the gene is mutated.
Homozygous = both of the 2 copies of the gene are mutated.
There are 2 MTHFR genes, so theoretically one could have 0, 1, 2, 3, or 4 mutated genes associated with the MTHFR enzyme in the Methylation Cycle.
Again, more info can be found on
mthfr.netFor more info on the Methylation Cycle, see
www.heartfixer.com/AMRI-Nutrigenomics.htm