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Stereochemistry ABSOLUTE
Molecular Formula C20H23N7O6.Ca.5H2O
Molecular Weight 587.594
Optical Activity UNSPECIFIED
Defined Stereocenters 2 / 2
E/Z Centers 0
Charge 0







Molecular Formula Ca
Molecular Weight 40.078
Charge 2
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Molecular Formula H2O
Molecular Weight 18.0153
Charge 0
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Molecular Formula C20H25N7O6
Molecular Weight 459.4558
Charge 0
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 2 / 2
E/Z Centers 0
Optical Activity UNSPECIFIED

For people with MTHFR gene variations, supplementing with the already activated form of folate (5-MTHF/5- METHYLTETRAHYDROFOLATE/LEVOMEFOLIC ACID) is far more effective in providing this form of folate than introducing the pre-converted form to the body through typical folate supplements. L-Methylfolate (5-MTHF) supplements provide the active form of folate naturally present in the body and available for biological action. 5-MTHF—the “active” form of folate that is able to pass the blood brain barrier. However, without a properly functioning methylenetetrahydrofolate reductase, MTHFR this conversion cannot take place and folate is not converted to forms that can cross the blood brain barrier. That is where 5-MTHF supplements come in. Levomefolate calcium is structurally identical to L-5-methyltetrahydrofolate (L-5-methyl-THF), a metabolite of vitamin B9. Mean baseline concentrations of about 15 nmol/L are reached in populations without folate food fortification under normal nutritional conditions. Orally administered levomefolate calcium is absorbed and is incorporated into the body folate pool. Peak plasma concentrations of about 50 nmol/L above baseline are reached within 0.5 – 1.5 hours after single oral administration of 0.451 mg levomefolate calcium. Steady state conditions for total folate in plasma after intake of 0.451 mg levomefolate calcium. In red blood cells, achievement of steady state is delayed due to the long lifespan of red blood cells of about 120 days. Levomefolate calcium is a part of contraceptive tablets: SAFYRA. Safyral is an estrogen/progestin COC (Combined Oral Contraceptive) containing a folate, indicated for use by women to: prevent pregnancy and raise folate levels in women who choose to use an oral contraceptive for contraception. COCs lower the risk of becoming pregnant primarily by suppressing ovulation. Other possible mechanisms may include cervical mucus changes that inhibit sperm penetration and endometrial changes that reduce the likelihood of implantation.

Approval Year



ConditionModalityTargetsHighest PhaseProduct

Approved Use

1.1 Oral Contraceptive: Safyral is indicated for use by women to prevent pregnancy. 1.2 Folate Supplementation Safyral is indicated in women who choose to use an oral contraceptive as their method of contraception, to raise folate levels for the purpose of reducing the risk of a neural tube defect in a pregnancy conceived while taking the product or shortly after discontinuing the product.

Launch Date





Folate improves endothelial function in coronary artery disease: an effect mediated by reduction of intracellular superoxide?
2001 Jul
Folate and chemoprevention of colorectal cancer: Is 5-methyl-tetrahydrofolate an active antiproliferative agent in folate-treated colon-cancer cells?
2001 Jul-Aug
Carrier-mediated transport of folic acid in BeWo cell monolayers as a model of the human trophoblast.
2001 Nov
Folic-acid-mediated inhibition of human colon-cancer cell growth.
2001 Sep
Psychomotor retardation, spastic paraplegia, cerebellar ataxia and dyskinesia associated with low 5-methyltetrahydrofolate in cerebrospinal fluid: a novel neurometabolic condition responding to folinic acid substitution.
2002 Dec
Monitoring of methotrexate and reduced folates in the cerebrospinal fluid of cancer patients.
2002 Dec
Preponderance of methylenetetrahydrofolate reductase C677T homozygosity among leukemia patients intolerant to methotrexate.
2002 Dec
Antisense inhibition of methylenetetrahydrofolate reductase reduces survival of methionine-dependent tumour lines.
2002 Jul 15
5,10-Methylenetetrahydrofolate reductase (MTHFR) assay in the forward direction: residual activity in MTHFR deficiency.
2002 Jun
The C677T mutation in the methylenetetrahydrofolate reductase gene contributes to hyperhomocysteinemia in patients taking anticonvulsants.
2002 Jun
Interaction of 5-methyltetrahydrofolate and tetrahydrobiopterin on endothelial function.
2002 Jun
Role of the C-terminus and the long cytoplasmic loop in reduced folate carrier expression and function.
2002 May 1
Cytoplasmic serine hydroxymethyltransferase mediates competition between folate-dependent deoxyribonucleotide and S-adenosylmethionine biosyntheses.
2002 Oct 11
Effect of low doses of 5-methyltetrahydrofolate and folic acid on plasma homocysteine in healthy subjects with or without the 677C-->T polymorphism of methylenetetrahydrofolate reductase.
2002 Sep
Uptake of 5-methyltetrahydrofolate into PC-3 human prostate cancer cells is carrier-mediated.
2003 Aug
Dietary prevention of post-angioplasty restenosis. From illusion and disillusion to pragmatism.
2003 Dec
Cobalamin-dependent methionine synthase: probing the role of the axial base in catalysis of methyl transfer between methyltetrahydrofolate and exogenous cob(I)alamin or cob(I)inamide.
2003 Dec 16
Effect of riboflavin status on the homocysteine-lowering effect of folate in relation to the MTHFR (C677T) genotype.
2003 Feb
Affinity extraction combined with stable isotope dilution LC/MS for the determination of 5-methyltetrahydrofolate in human plasma.
2003 Feb 1
Transport of 5-formyltetrahydrofolate into primary cultured rat astrocytes.
2003 Feb 1
Determination of 5-methyltetrahydrofolic acid and folic acid in citrus juices using stable isotope dilution-mass spectrometry.
2003 Feb 26
Transport of 5-formyltetrahydrofolate into primary cultured cerebellar granule cells.
2003 Feb 7
A comparison of folic acid and 5-methyltetrahydrofolate for prevention of DNA damage and cell death in human lymphocytes in vitro.
2003 Jan
A method for the analysis of natural and synthetic folate in foods.
2003 Jan 15
Analysis of the human folate receptor beta gene for an association with neural tube defects.
2003 Jun
A mass spectrometric validated high-performance liquid chromatography procedure for the determination of folates in foods.
2003 Jun 18
Residues 45 and 404 in the murine reduced folate carrier may interact to alter carrier binding and mobility.
2003 Jun 27
Methylenetetrahydrofolate reductase polymorphism in advanced colorectal cancer: a novel genomic predictor of clinical response to fluoropyrimidine-based chemotherapy.
2003 May
Characterization of a pseudogene for murine methylenetetrahydrofolate reductase.
2003 Oct
Regulation of S-adenosylmethionine levels in Saccharomyces cerevisiae.
2003 Oct 31
Cerebrospinal fluid pterins and folates in Aicardi-Goutières syndrome: a new phenotype.
2003 Sep 9
Hyperproliferation of homocysteine-treated colon cancer cells is reversed by folate and 5-methyltetrahydrofolate.
2004 Apr
The C677 mutation in methylene tetrahydrofolate reductase gene: correlation with uric acid and cardiovascular risk factors in elderly Korean men.
2004 Apr
Quantitative evaluation of the drug-drug interactions between methotrexate and nonsteroidal anti-inflammatory drugs in the renal uptake process based on the contribution of organic anion transporters and reduced folate carrier.
2004 Apr
A review of folate receptor alpha cycling and 5-methyltetrahydrofolate accumulation with an emphasis on cell models in vitro.
2004 Apr 29
Normal dopaminergic and serotonergic metabolites in cerebrospinal fluid and blood of restless legs syndrome patients.
2004 Feb
Folate, homocysteine, endothelial function and cardiovascular disease.
2004 Feb
Determination of folate vitamers in human serum by stable-isotope-dilution tandem mass spectrometry and comparison with radioassay and microbiologic assay.
2004 Feb
Comparative study on pressure and temperature stability of 5-methyltetrahydrofolic acid in model systems and in food products.
2004 Feb 11
Methylenetetrahydrofolate reductase and transcobalamin genetic polymorphisms in human spontaneous abortion: biological and clinical implications.
2004 Feb 17
Thymidylate synthase and methylenetetrahydrofolate reductase gene polymorphisms: relationships with 5-fluorouracil sensitivity.
2004 Jan 26
Placental folate transport and binding are not impaired in pregnancies complicated by fetal growth restriction.
2004 Jul
Mutations of the MTHFR gene (428C>T and [458G>T+459C>T]) markedly decrease MTHFR enzyme activity.
2004 Jun
Pharmacokinetic study on the utilisation of 5-methyltetrahydrofolate and folic acid in patients with coronary artery disease.
2004 Mar
5-Methyltetrahydrofolic acid and folic acid measured in plasma with liquid chromatography tandem mass spectrometry: applications to folate absorption and metabolism.
2004 Mar 15
Homocysteine and reactive oxygen species in metabolic syndrome, type 2 diabetes mellitus, and atheroscleropathy: the pleiotropic effects of folate supplementation.
2004 May 10
The methionine synthase polymorphism D919G alters susceptibility to primary central nervous system lymphoma.
2004 May 17
Methionine metabolism in plants: chloroplasts are autonomous for de novo methionine synthesis and can import S-adenosylmethionine from the cytosol.
2004 May 21
Folic acid-mediated inhibition of serum-induced activation of EGFR promoter in colon cancer cells.
2004 Sep
Betaine rescue of an animal model with methylenetetrahydrofolate reductase deficiency.
2004 Sep 15

Sample Use Guides

Take one tablet daily by mouth at the same time every day
Route of Administration: Oral
neural stem cells (NSCs) were exposed to folic acid or 5-methyltetrahydrofolate (5-MTHF) (0-200 μmol/L) for 24, 48 or 72 h
Substance Class Chemical
by admin
on Thu Jul 06 16:35:21 UTC 2023
by admin
on Thu Jul 06 16:35:21 UTC 2023
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Created by admin on Thu Jul 06 16:35:21 UTC 2023 , Edited by admin on Thu Jul 06 16:35:21 UTC 2023
Created by admin on Thu Jul 06 16:35:21 UTC 2023 , Edited by admin on Thu Jul 06 16:35:21 UTC 2023
Created by admin on Thu Jul 06 16:35:21 UTC 2023 , Edited by admin on Thu Jul 06 16:35:21 UTC 2023
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