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Vitamin

Folinic Acid (Leucovorin)

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Folinic Acid (Leucovorin). Reduced folate form.

How it works. Tetrahydrofolate derivative; bypasses DHFR.

What the research supports. 1 graded claims. Strongest: Folate antagonist rescue (moderate).

How much to take. Typical dose: 5–25 mg.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Omega-3 (EPA/DHA), Alpha-GPC or CDP-choline.

Common forms. Available as Capsule or softgel, Sublingual tablet or liquid, Methylated active form for sensitive individuals, Multivitamin matrix.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Folinic Acid (Leucovorin). Anecdotes are not medical advice.

Folinic Acid (Leucovorin). Reduced folate form.

Molecular structureC20H23N7O7 · 473.4 g/mol

What it is

Reduced folate form.

Food sources

Whole-food sources (animal products for fat-soluble and B-complex vitamins; produce for water-soluble vitamins)Fortified foods (cereals, dairy, plant milks, nutritional yeast)Multivitamins or stand-alone supplements in synthetic or food-derived form

Goals

General WellnessBrain & Cognitive

How it works

Tetrahydrofolate derivative; bypasses DHFR.

Pathways

  • Tetrahydrofolate derivative
  • bypasses DHFR

Effects

  • +Folate antagonist rescue supports

What the research supports

Folate antagonist rescuemoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
5–25 mg
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith a meal containing fat for fat-soluble compounds; otherwise either.
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • Well tolerated

Medication interactions

Prescription medications (general)minor

Always disclose Folinic Acid (Leucovorin) use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Omega-3 (EPA/DHA)Membrane fluidity and neuronal signaling support.
  • Alpha-GPC or CDP-cholineProvides choline substrate for acetylcholine synthesis.

Common forms

  • Capsule or softgel
  • Sublingual tablet or liquid
  • Methylated active form for sensitive individuals
  • Multivitamin matrix

Key studies

8 studies cited in total.

PubMed: Folinic Acid (Leucovorin) — Folate antagonist rescue ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Folinic Acid (Leucovorin) and "Folate antagonist rescue". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Folinic Acid (Leucovorin) — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Folinic Acid (Leucovorin) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Folinic Acid (Leucovorin) — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Folinic Acid (Leucovorin) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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