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Milk Thistle (Liver)

Silymarin — most-studied liver herb, used for ALD, NAFLD, and toxin protection.

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Overview

Silymarin — most-studied liver herb, used for ALD, NAFLD, and toxin protection.

Natural sources
  • Whole dried plant material (root, leaf, flower, or aerial parts depending on the species)
  • Standardized hydroethanolic or aqueous extract (capsule, tincture, or tea)
  • Powdered traditional preparation used in Ayurvedic, TCM, or Western herbal practice
Common forms
  • Standardized extract capsule
  • Liquid tincture (alcohol or glycerin)
  • Powdered whole herb
  • Traditional decoction or tea

Mechanism of action

Stabilizes hepatocyte membranes; raises GSH; antifibrotic.

Pathways
  • · Stabilizes hepatocyte membranes
  • · raises GSH
  • · antifibrotic

Effects on the body

Supports
Antidote for amatoxin poisoning (IV)
Supports
Modest ALT/AST improvements

Organ system effects

Liver

Milk Thistle (Liver) supports hepatocyte antioxidant defenses (glutathione, Nrf2) and phase-I/II detoxification.

Evidence-based benefits

Antidote for amatoxin poisoning (IV)

Strong evidence

Modest ALT/AST improvements

Limited evidence

Potential side effects

Common
  • · GI upset
Rare
    Serious

      Drug interactions

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

      Safety & non-supplemental interactions

      Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

      Avoid if you are
      • ·Pregnant or breastfeeding (insufficient safety data)
      • ·Children under 18 (unless directed by a clinician)

      Supplement interactions

      Pairs well with
      • Milk thistle (silymarin)
        Complementary hepatoprotective antioxidant pathways.
      • NAC
        Restores hepatic glutathione.
      Avoid combining with

      No specific avoidances listed.

      Dosing & bioavailability

      Typical dose
      200–400 mg silymarin
      Best form
      Most evidence is based on the standardized extract capsule form.
      Timing
      Consistent daily timing recommended; split larger doses if GI tolerance is a concern.
      With food?
      With food

      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 evidence9Show studies
      Meta-analysisCochrane Database · 2007

      Silymarin for liver disease: a meta-analysis

      Rambaldi A, et al.

      Cochrane review of milk thistle in liver disease.

      Key findings

      Possible reduction in liver-related mortality; methodology heterogeneous.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — Antidote for amatoxin poisoning

      Live PubMed search

      Live results for "Milk Thistle (Liver) Antidote for amatoxin poisoning" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Milk Thistle (Liver) and "Antidote for amatoxin poisoning". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — Modest ALT/AST improvements

      Live PubMed search

      Live results for "Milk Thistle (Liver) Modest ALT/AST improvements" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Milk Thistle (Liver) and "Modest ALT/AST improvements". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — randomized controlled trial

      Live PubMed search

      Live results for "Milk Thistle (Liver) randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

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

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — meta-analysis

      Live PubMed search

      Live results for "Milk Thistle (Liver) meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

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

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — pharmacokinetics

      Live PubMed search

      Live results for "Milk Thistle (Liver) pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Milk Thistle (Liver) and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — safety adverse events

      Live PubMed search

      Live results for "Milk Thistle (Liver) safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Milk Thistle (Liver) and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewPubMed (NLM) · 1970

      PubMed: Milk Thistle (Liver) — dose response

      Live PubMed search

      Live results for "Milk Thistle (Liver) dose response" across the PubMed/MEDLINE peer-reviewed index.

      Key findings

      Opens current human and preclinical literature matching Milk Thistle (Liver) and "dose response". Filter by RCT, meta-analysis, or year on the results page.

      Open study
      Systematic reviewGoogle Scholar · 1970

      Google Scholar: Milk Thistle (Liver) — clinical evidence

      Live Scholar search

      Cross-database citation index for Milk Thistle (Liver) 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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