Milk thistle

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Milk Thistle
Silybum marianum
Silybum marianum
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Asterales
Family: Asteraceae
Subfamily: Lactucoideae
Tribe: Cardueae
Genus: Silybum
Adans.
Species

Milk thistles are thistles of the genus Silybum Adans., flowering plants of the daisy family (Asteraceae). They are native to the Mediterranean regions of Europe, North Africa and the Middle East. Whilst health uses mostly for chronic liver disease have been traditionally claimed for the plant, increasing research is being undertaken on this and other possible medical uses.[1]

Description and classification

File:Dadar3s1.jpg
Dried Thistle flowers at the beginning of summer

Members of this genus grow as annual or biennial plants. The erect stem is tall, branched and furrowed but not spiny. The large, alternate leaves are waxy-lobed, toothed and thorny, as in other genera of thistle. The lower leaves are cauline (attached to the stem without petiole). The upper leaves have a clasping base. They have large, disc-shaped pink-to-purple, rarely white, solitary flower heads at the end of the stem. The flowers consist of tubular florets. The phyllaries under the flowers occur in many rows, with the outer row with spine-tipped lobes and apical spines. The fruit is a black achene with a white pappus.
Only two species are currently classified in this genus:

  • Silybum eburneum Coss. & Dur., known as the Silver Milk Thistle, Elephant Thistle, or Ivory Thistle
    • Silybum eburneum Coss. & Dur. var. hispanicum
  • Silybum marianum (L.) Gaertner, the Blessed Milk Thistle, which has a large number of other common names, such as Variegated Thistle.

The two species hybridise naturally, the hybrid being known as Silybum × gonzaloi Cantó , Sánchez Mata & Rivas Mart. (S. eburneum var. hispanicum x S. marianum)

A number of other plants have been classified in this genus in the past but have since been relocated elsewhere in the light of additional research.

S. marianum is by far the more widely known species. It is believed to give some remedy for liver diseases (e.g. viral hepatitis) and an extract, silymarin, is used in medicine. The adverse effect of the medicinal use of milk thistle is loose stools.

Health benefits

Milk thistles have been reported to have protective effects on the liver and to improve its function. They are typically used to treat liver cirrhosis, chronic hepatitis (liver inflammation), and gallbladder disorders. The active compound in Milk thistle credited with this effect is "silymarin", and is typically administered in amount ranging from 200-500mg per day (common Milk Thistle supplements have an 80% standardized extract of silymarin). Increasing research is being carried out into its possible medical uses and the mechanisms of such effects.[1]. However, a previous literature review using only studies with both double-blind and placebo protocols concluded that milk thistle and its derivatives "does not seem to significantly influence the course of patients with alcoholic and/or hepatitis B or C liver diseases."[2]

Treatment claims also include:

See also

References

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Wikimedia Commons has media related to:
  • Hepatitis C Treatment Conclusions by various referenced studies on the potential use of milk thistle in treating Hepatitis C and other liver health issues.

External links

Footnotes

  1. 1.0 1.1 Gazák R, Walterová D, Kren V (2007). "Silybin and silymarin--new and emerging applications in medicine". Curr. Med. Chem. 14 (3): 315–38. PMID 17305535. doi:10.2174/092986707779941159. 
  2. Rambaldi A, Jacobs BP, Iaquinto G, Gluud C (2005). "Milk thistle for alcoholic and/or hepatitis B or C liver diseases--a systematic cochrane hepato-biliary group review with meta-analyses of randomized clinical trials". Am. J. Gastroenterol. 100 (11): 2583–91. PMID 16279916. doi:10.1111/j.1572-0241.2005.00262.x. 
  3. National Center for Complementary and Alternative Medicine. "Milk Thistle". National Institutes of Health.  - General information on milk thistle
cs:Ostropestřec mariánský

de:Mariendistelid:Silybum it:Silybum marianum he:גדילן מצוי lt:Margainis nl:Silybumoc:Cardet mariansv:Mariatistlar


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