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Types of Milk Thistle (Silymarin): Forms & Bioavailability

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Forms Comparison

FormBioavailabilityBest For
Standardized Silymarin Extract (70-80%)Low-Moderate (20-50% absorption)Standard supplementation — most studied form, affordable and widely available
Silymarin-Phosphatidylcholine Complex (Siliphos/Silipide)High (4-10x greater absorption)Enhanced absorption — phytosome technology dramatically improves oral bioavailability of silybin
Silybin Meglumine (Legalon SIL)High (IV formulation)Clinical/hospital use — intravenous form used for acute mushroom poisoning (Amanita phalloides)

Standardized Silymarin Extract (70-80%)

Bioavailability: Low-Moderate (20-50% absorption). Best for: Standard supplementation — most studied form, affordable and widely available.

Silymarin-Phosphatidylcholine Complex (Siliphos/Silipide)

Bioavailability: High (4-10x greater absorption). Best for: Enhanced absorption — phytosome technology dramatically improves oral bioavailability of silybin.

Silybin Meglumine (Legalon SIL)

Bioavailability: High (IV formulation). Best for: Clinical/hospital use — intravenous form used for acute mushroom poisoning (Amanita phalloides).

Full Milk Thistle (Silymarin) Guide

References

  1. (). Randomized controlled trial of silymarin treatment in patients with cirrhosis of the liver. Journal of Hepatology. DOI
  2. (). The use of silymarin in the treatment of liver diseases. Drugs. DOI
  3. (). The therapeutic effect of silymarin in the treatment of nonalcoholic fatty disease: A meta-analysis (PRISMA) of randomized control trials. Medicine. DOI
  4. (). Identification of hepatoprotective flavonolignans from silymarin. Proceedings of the National Academy of Sciences. DOI