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Supplements/Compound

Soy Lecithin

Phosphatidylcholine source.

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Overview

Phosphatidylcholine source.

Natural sources
  • Endogenously produced or biosynthesized molecule
  • Standardized pharmaceutical- or food-grade supplement
  • Combined with cofactors that improve absorption or activity
Common forms
  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Mechanism of action

Phosphatidylcholine emulsifier.

Pathways
  • · Phosphatidylcholine emulsifier

Effects on the body

Supports
Liver fat reduction

Organ system effects

Brain & CNS

Soy Lecithin acts on central nervous system targets implicated in attention, memory, and neuroprotection.

Liver

Soy Lecithin supports hepatocyte antioxidant defenses (glutathione, Nrf2) and phase-I/II detoxification.

Evidence-based benefits

Liver fat reduction

Moderate evidence

Potential side effects

Common
  • · GI upset
Rare
    Serious

      Drug interactions

      Prescription medications (general)
      Always disclose Soy Lecithin use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.
      minor

      Supplement interactions

      Pairs well with
      • Omega-3 (EPA/DHA)
        Membrane fluidity and neuronal signaling support.
      • Alpha-GPC or CDP-choline
        Provides choline substrate for acetylcholine synthesis.
      • Milk thistle (silymarin)
        Complementary hepatoprotective antioxidant pathways.
      Avoid combining with

      No specific avoidances listed.

      Dosing & bioavailability

      Typical dose
      1–3 g
      Best form
      Most evidence is based on the capsule or softgel form.
      Timing
      Consistent daily timing recommended; split larger doses if GI tolerance is a concern.
      With food?
      With a meal containing fat for fat-soluble compounds; otherwise either.

      Where to buy

      Affiliate links — we may earn a commission at no extra cost to you. Amazon code supplementsch-20 is auto-applied at checkout. We don't endorse specific brands; verify third-party testing (USP, NSF, Informed Sport) before purchase.

      Scientific evidence8Show studies
      AnimalNutrition · 2005

      Lecithin in NAFLD

      Buang Y, et al.

      High-fat diet rats

      Key findings

      Reduced hepatic steatosis.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Soy Lecithin — Liver fat reduction

      Live PubMed search

      Live results for "Soy Lecithin Liver fat reduction" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Soy Lecithin and "Liver fat reduction". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Soy Lecithin — randomized controlled trial

      Live PubMed search

      Live results for "Soy Lecithin randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Soy Lecithin and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Soy Lecithin — meta-analysis

      Live PubMed search

      Live results for "Soy Lecithin meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Soy Lecithin and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Soy Lecithin — pharmacokinetics

      Live PubMed search

      Live results for "Soy Lecithin pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Soy Lecithin and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Soy Lecithin — safety adverse events

      Live PubMed search

      Live results for "Soy Lecithin safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Soy Lecithin and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Soy Lecithin — dose response

      Live PubMed search

      Live results for "Soy Lecithin dose response" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Soy Lecithin and "dose response". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewGoogle Scholar · 1970

      Google Scholar: Soy Lecithin — clinical evidence

      Live Scholar search

      Cross-database citation index for Soy Lecithin as it relates to "clinical evidence".

      Key findings

      Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

      Open study
      Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.

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