Methylation Support IV

Full ingredient list

Exact amounts delivered in each size. Formulas are compounded per patient and can be adjusted by your provider.

Supporting studies

• 1

  A meta-analysis of 21 studies found leucovorin (folinic acid) safe, well tolerated, and broadly beneficial when folate delivery is impaired.

  This systematic review and meta-analysis examined 21 studies of leucovorin (folinic acid) in autism spectrum disorder, including four placebo-controlled and three prospective controlled trials. Leucovorin significantly improved communication with medium-to-large effect sizes, and in individuals with documented cerebral folate deficiency it improved overall symptoms in 67%, ataxia in 88%, pyramidal signs in 76%, epilepsy in 75%, and irritability in 58%. The authors concluded that d,l-leucovorin 'appears safe and generally well-tolerated,' with the strongest evidence coming from blinded, placebo-controlled studies. Leucovorin works in these settings because it is a reduced folate that enters the one-carbon cycle past the usual conversion bottlenecks. Route was oral.

  Systematic review and meta-analysis Rossignol DA, Frye RE Cerebral Folate Deficiency, Folate Receptor Alpha Autoantibodies and Leucovorin (Folinic Acid) Treatment in Autism Spectrum Disorders: A Systematic Review and Meta-Analysis. Journal of Personalized Medicine. 2021. PMID 34834493 ↗

• 2

  Folinic acid — the pre-reduced, ready-to-use form of folate — produced significant gains in verbal communication in a randomized, double-blind, placebo-controlled trial.

  Forty-eight children with autism spectrum disorder and language impairment were randomized to folinic acid at 2 mg/kg/day (maximum 50 mg/day) or placebo for 12 weeks in double-blind fashion. Verbal communication improved significantly more on folinic acid, by 5.7 standardized points (95% CI 1.0-10.4) with a medium-to-large effect size (Cohen's d = 0.70). In children whose folate transport into the brain was impaired by folate receptor-alpha autoantibodies, the effect was even larger at 7.3 points (95% CI 1.4-13.2), Cohen's d = 0.91. Folinic acid was used precisely because it enters the folate pool already reduced. Route was oral.

  Randomized controlled trial Frye RE, et al. Folinic acid improves verbal communication in children with autism and language impairment: a randomized double-blind placebo-controlled trial. Molecular Psychiatry. 2018. PMID 27752075 ↗

• 3

  Folate plus B12 reliably lowers homocysteine — the methylation-cycle marker — by roughly a quarter to a third.

  This meta-analysis pooled 12 randomized controlled trials in 1,114 participants. Folic acid at 0.5-5 mg daily reduced blood homocysteine by 25% (95% CI 23-28%), and adding about 0.5 mg of vitamin B12 produced a further 7% reduction (95% CI 3-10%). Together, the authors estimated the combination would move a typical Western homocysteine level from about 12 micromol/L down to 8-9 micromol/L. Homocysteine is the direct readout of how well the one-carbon methylation cycle is turning over; the trials used oral dosing.

  Meta-analysis of randomized controlled trials Homocysteine Lowering Trialists' Collaboration Lowering blood homocysteine with folic acid based supplements: meta-analysis of randomised trials. BMJ. 1998. PMID 9569395 ↗

• 4

  Injected B12 bypasses the gut absorption machinery entirely, which is why clinicians reach for it first when they want a guaranteed response.

  In this expert 'How I Treat' review in Blood, the author explains that oral B12 absorption depends on intrinsic factor and an intact terminal ileum, and states plainly: 'I always begin with intramuscular cobalamin to bypass potential barriers to immediate effectiveness.' A single 1000 mcg injection is enough to correct the anemia, with up to 150 mcg retained from that dose in most patients. Neurologic improvement typically begins within the first week. The same logic underlies parenteral B12 given by IV.

  Expert clinical review Carmel R How I treat cobalamin (vitamin B12) deficiency. Blood. 2008. PMID 18606874 ↗

• 5

  A year of methylcobalamin B12 measurably improved nerve function, pain and quality of life in people with diabetic neuropathy.

  In a 1-year randomized, double-blind, placebo-controlled trial of 90 people with type 2 diabetes and both peripheral and autonomic neuropathy, participants received either 1000 mcg of methylcobalamin daily or placebo (oral route). The treated group showed significant improvement in vibration perception threshold, neuropathy screening scores, pain scores, sural nerve conduction velocity, sural nerve action potential, sudomotor (sweat gland) function, and overall quality of life. Blood B12 rose from 232.0 to 776.7 pmol/L (p<0.0001).

  Randomized controlled trial Didangelos T, et al. Vitamin B12 Supplementation in Diabetic Neuropathy: A 1-Year, Randomized, Double-Blind, Placebo-Controlled Trial. Nutrients. 2021. PMID 33513879 ↗

• 6

  Intravenous high-dose methylcobalamin was well tolerated and improved muscle strength in patients with peripheral neuropathy.

  A phase I/II open-label clinical trial gave 25 mg of methylcobalamin intravenously each day for 10 days, then monthly for 5 months, to 14 patients with immune-mediated or hereditary neuropathy involving chronic axonal degeneration. Among the 12 patients evaluated, MRC muscle strength sum scores improved in seven, and no adverse effects occurred in any of the 12. The authors concluded that IV ultra-high-dose methylcobalamin is a safe and potentially effective therapy for peripheral neuropathy. This is direct intravenous-route evidence.

  Clinical trial (phase i/ii, open label) Shibuya K, et al. Safety and efficacy of intravenous ultra-high dose methylcobalamin treatment for peripheral neuropathy: a phase I/II open label clinical trial. Internal Medicine. 2014. PMID 25175124 ↗

• 7

  Methionine is the raw material for SAMe, the body's principal methyl donor, which is made mainly in the liver and is central to healthy liver metabolism.

  This comprehensive Physiological Reviews article describes how the enzyme methionine adenosyltransferase converts methionine and ATP into S-adenosylmethionine (SAMe), the body's main biological methyl donor, with the liver as the primary site of production. The review details how adequate hepatic SAMe supports methylation reactions, antioxidant defense and normal liver homeostasis, while experimental models with reduced hepatic SAMe develop oxidative stress and steatohepatitis. It also notes SAMe's therapeutic promise in intrahepatic cholestasis of pregnancy. This is the mechanistic rationale for methionine's inclusion as a lipotropic, methyl-donor nutrient.

  Mechanistic review Lu SC, Mato JM S-adenosylmethionine in liver health, injury, and cancer. Physiological Reviews. 2012. PMID 23073625 ↗

• 8

  Methionine is an essential sulfur amino acid that feeds directly into glutathione production and activates the body's own antioxidant enzymes.

  This review characterizes methionine as an aliphatic, sulfur-containing essential amino acid that the body cannot synthesize and must obtain from outside sources. It describes methionine's role in lipid metabolism, in activating endogenous antioxidant enzymes such as methionine sulfoxide reductase A, and in the biosynthesis of glutathione to counteract oxidative stress. Methionine also serves as a precursor for other key metabolites and helps regulate immune and metabolic function in mammals. This links methionine and N-acetylcysteine to the same downstream antioxidant pathway.

  Mechanistic review Martínez Y, et al. The role of methionine on metabolism, oxidative stress, and diseases. Amino Acids. 2017. PMID 28929442 ↗

• 9

  Choline — the head group of phosphatidylcholine — was formally recognized as an essential nutrient by the Institute of Medicine in 1998, yet most Americans fall well short of the recommended intake.

  Zeisel and da Costa's review documents that the Institute of Medicine designated choline an essential nutrient in 1998, setting Adequate Intakes of 550 mg/day for men and 425 mg/day for women, based in part on the liver damage observed at lower intakes. Because choline supports everything from cell membrane structure to neurotransmitter synthesis, inadequate intake is linked to liver disease and atherosclerosis. The authors note that mean intakes for older children, men, women and pregnant women fall far below the IOM's adequate intake, and call for dietary guidance to increase consumption of choline-rich foods.

  Narrative review / nutritional requirement analysis Zeisel SH, da Costa KA Choline: an essential nutrient for public health. Nutrition Reviews. 2009. PMID 19906248 ↗

• 10

  Vitamin B6 in its active P5P form is the required cofactor for more than 140 biochemical reactions, including the synthesis of serotonin, dopamine and GABA.

  This peer-reviewed review of vitamin B6 biology states that vitamin B6 'is an enzymatic co-factor required for more than 140 biochemical reactions' — roughly 4% of all classified enzyme activities — spanning transaminations, decarboxylations and amino acid metabolism. It further notes that 'VitB6 is required for the biosynthesis of several neurotransmitters like serotonin, dopamine, and gamma-aminobutyric acid (GABA).' Pyridoxal-5-phosphate (P5P) is the already-activated coenzyme form that these enzymes bind directly.

  Mechanistic review Hellmann H, Mooney S Vitamin B6: A Molecule for Human Health?. Molecules. 2010. PMID 20110903 ↗

• 11

  Glutathione is the body's most abundant intracellular antioxidant and its central redox regulator.

  This widely cited review in Molecular Aspects of Medicine describes glutathione as the most abundant low-molecular-weight thiol compound synthesized in human cells. The authors detail its role in protecting cells from oxidative damage and from the toxicity of reactive xenobiotic electrophiles, and in maintaining the cell's overall redox balance. The paper covers where oxidants and electrophiles come from, how glutathione eliminates them (by reduction and by conjugation), and how glutathione synthesis is regulated - including therapeutic strategies for raising cellular glutathione content.

  Mechanistic review Forman HJ, Zhang H, Rinna A Glutathione: overview of its protective roles, measurement, and biosynthesis. Molecular Aspects of Medicine. 2009. PMID 18796312 ↗

References

• 1Rossignol DA, Frye RE. Cerebral Folate Deficiency, Folate Receptor Alpha Autoantibodies and Leucovorin (Folinic Acid) Treatment in Autism Spectrum Disorders: A Systematic Review and Meta-Analysis. Journal of Personalized Medicine. 2021. PMID 34834493 ↗
• 2Frye RE, et al. Folinic acid improves verbal communication in children with autism and language impairment: a randomized double-blind placebo-controlled trial. Molecular Psychiatry. 2018. PMID 27752075 ↗
• 3Homocysteine Lowering Trialists' Collaboration. Lowering blood homocysteine with folic acid based supplements: meta-analysis of randomised trials. BMJ. 1998. PMID 9569395 ↗
• 4Carmel R. How I treat cobalamin (vitamin B12) deficiency. Blood. 2008. PMID 18606874 ↗
• 5Didangelos T, et al. Vitamin B12 Supplementation in Diabetic Neuropathy: A 1-Year, Randomized, Double-Blind, Placebo-Controlled Trial. Nutrients. 2021. PMID 33513879 ↗
• 6Shibuya K, et al. Safety and efficacy of intravenous ultra-high dose methylcobalamin treatment for peripheral neuropathy: a phase I/II open label clinical trial. Internal Medicine. 2014. PMID 25175124 ↗
• 7Lu SC, Mato JM. S-adenosylmethionine in liver health, injury, and cancer. Physiological Reviews. 2012. PMID 23073625 ↗
• 8Martínez Y, et al. The role of methionine on metabolism, oxidative stress, and diseases. Amino Acids. 2017. PMID 28929442 ↗
• 9Zeisel SH, da Costa KA. Choline: an essential nutrient for public health. Nutrition Reviews. 2009. PMID 19906248 ↗
• 10Hellmann H, Mooney S. Vitamin B6: A Molecule for Human Health?. Molecules. 2010. PMID 20110903 ↗
• 11Forman HJ, Zhang H, Rinna A. Glutathione: overview of its protective roles, measurement, and biosynthesis. Molecular Aspects of Medicine. 2009. PMID 18796312 ↗