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Levomefolic acid (INN, also known as L-5-MTHF, L-methylfolate and L-5-methyltetrahydrofolate and (6S)-5-methyltetrahydrofolate, and (6S)-5-MTHF) is the primary biologically active form of folate used at the cellular level for DNA reproduction, the cysteine cycle and the regulation of homocysteine.
Cerefolin is a prescription medication made by Pamlab that contains 5.635 mg of folate as L-methylfolate, 1 mg of vitamin B 12 as methylcobalamin, 50 mg of vitamin B 2 as riboflavin, and 5 mg of vitamin B 6 as pyridoxine. It is approved by the U.S. Food and Drug Administration for the treatment or prevention of vitamin deficiencies. [1]
Methyl-B 12 converts homocysteine, in a reaction catalyzed by homocysteine methyltransferase, to methionine. A defect in homocysteine methyltransferase or a deficiency of B 12 may lead to a so-called "methyl-trap" of THF, in which THF converts to methyl-THF, causing a deficiency in folate. [97] Thus, a deficiency in B 12 can cause accumulation ...
Metanx is a prescription medical food made by Alfasigma that contains L-methylfolate (as Metafolin, a calcium salt of vitamin B 9), methylcobalamin (vitamin B 12) and pyridoxal 5'-phosphate (vitamin B 6). It is a vitamin B supplement. Metanx is indicated for the dietary management of peripheral neuropathy (i.e. DPN). [1]
Folate deficiency can be secondary to vitamin B 12 deficiency or a defect in homocysteine methyl transferase that leads to a "folate trap" in which is an inactive metabolite that cannot be recovered. [1] Diagnosis is typically confirmed by blood tests, including a complete blood count, and serum folate levels. [1]
"B12" and "Cbl" redirect here. For other uses of B12, see B12 (disambiguation). For the musical group, see Carbon Based Lifeforms. Pharmaceutical compound Vitamin B12 General skeletal formula of cobalamins Stick model of cyanocobalamin (R = CN) based on the crystal structure Clinical data Other names Vitamin B12, vitamin B-12, cobalamin AHFS / Drugs.com Monograph MedlinePlus a605007 License ...
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