Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
L-methylfolate is the bioactive form of folate that bypasses the MTHFR enzyme conversion step required by folic acid. It directly supports neurotransmitter synthesis and one-carbon metabolism for mood regulation and cardiovascular health.
Reported Benefits (Provisional)
Origin & History
L-Methylfolate is the bioactive form of folate, a B-vitamin essential for DNA synthesis and repair. It is naturally found in leafy greens and is produced through a process that converts folic acid into its active form, which can be readily utilized by the body.
Research Narrative (Provisional)
L-Methylfolate has been studied in randomized controlled trials for its role in treating depression and enhancing the efficacy of antidepressants. Meta-analyses support its use in certain populations with folate deficiencies.
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
L-Methylfolate (5-MTHF) is the biologically active form of folate (vitamin B9), not a whole food but a single bioactive compound. Typical supplemental doses range from 400 mcg to 15 mg per serving. As a pure micronutrient compound, it contains no macronutrients (zero protein, fat, or carbohydrates in supplemental form). Key biochemical identity: molecular weight 459.45 g/mol, chemical formula C19H23N7O6. Bioactive compound concentration: standardized to 100% active L-methylfolate (as calcium salt or glucosamine salt in most supplements, e.g., Metafolin or Quatrefolic brands). Bioavailability is significantly superior to synthetic folic acid — absorption rate approaches 98-100% as it bypasses the MTHFR enzyme conversion step entirely, making it directly usable by cells. By comparison, synthetic folic acid bioavailability is approximately 50-85% and requires enzymatic conversion via methylenetetrahydrofolate reductase (MTHFR), which is impaired in 40-60% of the population carrying MTHFR gene variants (C677T or A1298C). Plasma half-life is approximately 3 hours. No fiber, mineral, or additional vitamin content is present as an isolated supplement. Co-factor interactions: works synergistically with vitamin B12 (methylcobalamin) and vitamin B6 (pyridoxal-5-phosphate) in the methylation cycle.
Reported Mechanism (Provisional)
L-methylfolate serves as a methyl donor in the folate cycle, directly supporting the conversion of homocysteine to methionine via methionine synthase. This process generates S-adenosylmethionine (SAMe), which is essential for neurotransmitter synthesis including serotonin, dopamine, and norepinephrine. Unlike folic acid, L-methylfolate bypasses the methylenetetrahydrofolate reductase (MTHFR) enzyme, making it bioavailable even in individuals with MTHFR genetic polymorphisms.
Clinical Narrative (Provisional)
Clinical trials demonstrate L-methylfolate supplementation reduces homocysteine levels by 20-25% in healthy adults within 4-8 weeks. A randomized controlled trial of 75 patients with treatment-resistant depression showed 15mg daily L-methylfolate as adjunct therapy improved depression scores by 32% compared to placebo over 8 weeks. Studies in pregnant women indicate 400-800mcg daily supports neural tube development more effectively than folic acid in those with MTHFR mutations. However, most depression studies are small-scale and require larger replication trials.
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