Folic acid is the synthetic form of vitamin ... Some people have a gene variant called methylenetetrahydrofolate reductase, or MTHFR. With this gene variant, your body doesn't use folate as ...

MTHFR: 5,10-methylenetetrahydrofolate reductase; MTR: 5-methyltetrahydrofolate-homocysteine methyltransferase; MTX-PG: Methotrexate polyglutamate; SLC19A1: Solute carrier family 19 member 1 ...