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Peptide Atlas · Vitamin

L-Methylfolate (5-MTHF, active folate)

5-methyltetrahydrofolate (5-MTHF) is the main naturally circulating folate; unlike synthetic folic acid, it is well absorbed when stomach pH is altered and does not depend on the MTHFR enzyme, so it bypasses that genetic defect.

What the evidence says

six tiers, never blended

established — replicated in humans, or settled by a regulator

every claim resolves to its source

All 2 citations resolve to their original source. · 0 posts naming it, 0 members counted once each.

  • created page created as 'L-Methylfolate (5-MTHF, active folate)' with aliases 5-MTHF, L-5-methyltetrahydrofolate, levomefolic acid, active folate, Metafolin/Quatrefolic (salt brands), vitamin B9 active form · 2026-09-27 12:04 · somebody
  • kind set kind set to vitamin: palette r2 · 2026-09-27 12:04 · somebody
  • fact added identity: PubChem CID 135398561: L-Methylfolate, C20H25N7O6, 459.5 g/mol. · 2026-09-27 12:04 · somebody
  • fact added identity: CAS registry number 31690-09-2. · 2026-09-27 12:04 · somebody
  • fact added identity: IUPAC name: (2S)-2-[[4-[[(6S)-2-amino-5-methyl-4-oxo-3,6,7,8-tetrahydropteridin-6-yl]methylamino]benzoyl]amino]pentanedi · 2026-09-27 12:04 · somebody
  • fact added summary: 5-methyltetrahydrofolate (5-MTHF) is the main naturally circulating folate; unlike synthetic folic acid, it is well abso · 2026-09-27 12:04 · somebody
  • fact added mechanism: Infused into the forearm of 10 patients with familial hypercholesterolaemia, 5-MTHF restored impaired endothelium-depend · 2026-09-27 12:04 · somebody
  • citation added pmid 24494987 cited as established: Review: folate, folic acid and 5-MTHF differ in absorption and metabolism · 2026-09-27 12:04 · somebody
  • citation added pmid 9462523 cited as emerging: 5-MTHF restored endothelial function in familial hypercholesterolaemia (n=10) · 2026-09-27 12:04 · somebody

Negative findings

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