Published May 15, 2021 | Version v1
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Pharmacological, Biochemical and Therapeutic Potential of Milk Thistle (Silymarin): A Review

  • 1. Biochemistry Unit, Department of Natural Sciences, Faculty of Pure and Applied Sciences, Precious Cornerstone University, Ibadan, Oyo State, Nigeria
  • 2. Microbiology Unit, Department of Natural Sciences, Faculty of Pure and Applied Sciences, Precious Cornerstone University, Ibadan, Oyo State, Nigeria

Description

Silymarin, a flavonolignan from the seeds of 'milk thistle' (Silybum marianum (L.) Gaertn.)), has been widely used from ancient times because of its excellent hepato-protective action. It is a mixture of mainly three flavonolignans, which are, silybin, silidianin, and silychristin, with silybin being the most active. Silymarin has been used medicinally to treat liver disorders, including acute and chronic viral hepatitis, toxin/drug-induced hepatitis, and cirrhosis and alcoholic liver diseases. It has also been reported to be effective in certain cancers. Its mechanism of action includes inhibition of hepatotoxin binding to receptor sites on the hepatocyte membrane; reduction of glutathione oxidation to enhance its level in the liver and intestine; antioxidant activity; and stimulation of ribosomal RNA polymerase and subsequent protein synthesis, leading to enhanced hepatocyte regeneration. It is orally absorbed but has very poor bioavailability due to its poor water solubility. This review focuses on the various pharmacological activities of silymarin.

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