Silymarin, derived from the milk thistle plant, Silybum marianum, has
been used for centuries as a natural remedy for diseases of the liver
and biliary tract. As interest in alternative therapy has emerged in t
he United States, gastroenterologists have encountered increasing numb
ers of patients taking silymarin with little understanding of its purp
orted properties. Silymarin and its active constituent, silybin, have
been reported to work as antioxidants scavenging free radicals and inh
ibiting lipid peroxidation. Studies also suggest that they protect aga
inst genomic injury, increase hepatocyte protein synthesis, decrease t
he activity of tumor promoters, stabilize mast cells, chelate iron, an
d slow calcium metabolism. In this article we review silymarin's histo
ry, pharmacology, and properties, and the clinical trials pertaining t
o patients with acute and chronic liver disease. (C) 1998 by Am. Cell.
of Gastroenterology).