Methylfolate and Vitamin B12: what the research found
PubMed indexes 8 records that name Methylfolate and Vitamin B12 together, either in the title or in an interaction, co-administration, or pharmacokinetic context. The key findings come first, in the authors’ own words, followed by every study with its design and PubMed link.
A summary of published research, not medical advice. A pharmacist can check any combination against your full list of medicines and supplements.
Reviews and human studies first. Each quote is the authors’ own conclusion about their study, not a NutriStack assessment, and a single study is not a consensus.
“A three-month supplementation with a combination of 800 mcg methylfolate and 1000 mcg methylcobalamin showed promise in lowering blood pressure and serum homocysteine levels in ESRD patients with resistant hypertension. These findings require additional exploration in larger studies.”
“LDL-C levels decreased by 11.8% in homozygous carriers (95% CI: -15.8% to -7.8%, p < 0.01) and 4.8% in mixed allele carriers (95% CI: -6.8% to -2.8%, p < 0.01), with a significant between-group difference (7.0%, 95% CI: -13.0% to -1.0%, p < 0.01). Methylfolate, P5P, and methylcobalamin supplementation tailored to genetic profiles effectively reduced homocysteine and LDL-C levels in patients with specific MTHFR,…”
“In a real-world clinical setting, patients with diabetic peripheral neuropathy treated with LMF-MC-PP achieved significant improvements in total symptom score (NTSS-6) and in quality of life and functioning, together with greater medication satisfaction. A limitation of this study was the use of a survey instrument to collect data on patient outcomes.”
The research
8 studies naming Methylfolate and Vitamin B12.
Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.
“A three-month supplementation with a combination of 800 mcg methylfolate and 1000 mcg methylcobalamin showed promise in lowering blood pressure and serum homocysteine levels in ESRD patients with resistant hypertension. These findings require additional exploration in larger studies.”
Names both Methylfolate and Vitamin B12 in its title.
“LDL-C levels decreased by 11.8% in homozygous carriers (95% CI: -15.8% to -7.8%, p < 0.01) and 4.8% in mixed allele carriers (95% CI: -6.8% to -2.8%, p < 0.01), with a significant between-group difference (7.0%, 95% CI: -13.0% to -1.0%, p < 0.01). Methylfolate, P5P, and methylcobalamin supplementation tailored to genetic profiles effectively reduced homocysteine and LDL-C levels in patients with specific MTHFR, MTR, and MTRR polymorphisms, particularly with homozygous minor…”
Names both Methylfolate and Vitamin B12 in its title.
British journal of haematology · 2006 · PMID 16445837
Case ReportsHuman subjects
“67.4%), polyglutamate chain length was shorter (more tetra- and pentaglutamates), and global DNA methylation was 22% lower. This is the first time that virtually all features of the methylfolate trap hypothesis have been demonstrated in a human with vitamin B12 deficiency.”
Names both Methylfolate and Vitamin B12 in its title.
“In linear correlation analyses, urinary FIGLU correlated with serum MMA, and GAr, SAICAr, and AICAr correlated with FIGLU, a marker of THF deficiency (p < 0.05). These findings are consistent with methylfolate trapping, linking B12 deficiency to reduced availability of folate cofactors for histidine catabolism and DNPS.”
Names both Methylfolate and Vitamin B12 in its title.
Current medical research and opinion · 2016 · PMID 26439233
Human subjects544 participants
“In a real-world clinical setting, patients with diabetic peripheral neuropathy treated with LMF-MC-PP achieved significant improvements in total symptom score (NTSS-6) and in quality of life and functioning, together with greater medication satisfaction. A limitation of this study was the use of a survey instrument to collect data on patient outcomes.”
Names both Methylfolate and Vitamin B12 in its title.
Limitations
What this evidence cannot tell you.
Search-based evidence indexes have real limits, and it is worth being explicit about them:
Selection. These records were found by searching PubMed titles and abstracts for both substance names alongside interaction and pharmacokinetic terms. Relevant work that phrases things differently, or is not indexed in PubMed, will be missing.
No effect size. The quoted conclusions are the authors’ words about their own study. We have not extracted effect direction or magnitude, and a single study’s conclusion is not a consensus.
Population mismatch. Findings in healthy volunteers, animals, or a specific patient group may not transfer to you, your dose, or your formulation.
Absence is not safety. Few published studies means the combination is under-studied, which is not the same as established as safe.
How to read this page
A literature summary, not guidance.
A study listed here is not proof that Methylfolate and Vitamin B12 interact. Two substances can be named together in a paper that never tested them in combination, and a source listed as background may cover only one of them.
Findings are quoted from each abstract as the authors wrote them. NutriStack has not re-analysed, pooled, or reconciled them, and they may disagree with each other.
Decisions about prescription medication and supplements belong with your prescriber or pharmacist, who can see your full regimen. Our timing guide and forms guide explain the general mechanisms.
Nearby evidence
Other pairs with published research.
Pages covering Methylfolate or Vitamin B12 alongside a different substance.
NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Methylfolate, Vitamin B12, and several hundred other substances.
Log your routine, get reminders at the times you choose, and scan a label to add a product. The checker is a research and organisation tool, not a clinical decision aid.
NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
