what is the mthfr enzyme function?
<answer> 5,10-methylenetetrahydrofolate reductase is an enzyme that plays a critical role in the metabolism of the vitamin, folic acid. It functions as the recycling enzyme for the active form of the vitamin. <context> 5,10-methylenetetrahydrofolate reductase (MTHFR) is an enzyme that plays a critical role in the metabolism of the vitamin, folic acid. It functions as the recycling enzyme for the active form of the vitamin (L5-methyltetrahydrofolate, 5-MTHF). There are two genetic variants (abnormal forms) of the MTHFR gene.