Common Names--milk thistle, Mary thistle, holy thistle. Milk thistle is sometimes called silymarin, which is actually a mixture of the herb's active components, including silybinin (also called silibinin or silybin).

Latin Name--Silybum marianum

• What Milk thistle Is Used For
  Milk thistle is believed to have protective effects on the liver and improve its function. It is typically used as an herbal remedy to treat liver cirrhosis, chronic hepatitis (liver inflammation), and gallbladder disorders. Treatment claims also include:
  • Lowering cholesterol levels
  • Reducing insulin resistance in people with type 2 diabetes who also have cirrhosis
  • Reducing the growth of cancer cells in breast, cervical, and prostate cancers
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    • Address the underlying cause of Endometriosis
    • Decrease pelvic inflammation associated with Endometriosis
    • Strengthen liver functioning and protect against environmental pollutants
    • Reduce menstrual pain and cramps
    • Regulate the menstrual cycle
    • Prevent diminished fertility in women with Endometriosis
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    • Improve functioning of the liver and promote health
    • Prevent problems associated with a sluggish liver (e.g. depressed immune systems, constant fatigue, obesity, sluggish digestive systems, allergies, respiratory ailments, unhealthy skin, irritability and many other health problems.)
    • Help treat liver disease and prevent further damage to the liver in diseases like viral hepatitis, cirrhosis, fatty liver, hemochromatosis, Alpha-1 antitrypsin deficiency and Wilson’s disease
    • Protect the healthy liver from damage caused by medications and alcohol
    • Improve gall bladder functioning, reduce inflammation and help dissipate gallstones
    • Neutralize toxins and as a liver-friendly anti-oxidant, vitamin and mineral supplement
• How Milk thistle Is Used
  Milk thistle is a flowering herb. Silymarin, which can be extracted from the seeds (fruit), is believed to be the biologically active part of the herb. The seeds are used to prepare capsules containing powdered herb or seed; extracts; and infusions (strong teas).
• What the Science Says about Milk thistle
  • There have been some studies of milk thistle on liver disease in humans, but these have been small. Some promising data have been reported, but study results at this time are mixed.
  • Although some studies conducted outside the United States support claims of oral milk thistle to improve liver function, there have been flaws in study design and reporting. To date, there is no conclusive evidence to prove its claimed uses.
  • NCCAM is supporting a phase II research study to better understand the use of milk thistle for chronic hepatitis C. With the National Institute of Diabetes and Digestive and Kidney Diseases, NCCAM is planning further studies of milk thistle for chronic hepatitis C and nonalcoholic steatohepatitis (liver disease that occurs in people who drink little or no alcohol).
  • The National Cancer Institute and the National Institute of Nursing Research are also studying milk thistle, for cancer prevention and to treat complications in HIV patients.
• Side Effects and Cautions of Milk thistle
  • In clinical trials, milk thistle generally has few side effects. Occasionally, people report a laxative effect, upset stomach, diarrhea, and bloating.
  • Milk thistle can produce allergic reactions, which tend to be more common among people who are allergic to plants in the same family (for example, ragweed, chrysanthemum, marigold, and daisy).
  • It is important to inform your health care providers about any herb or dietary supplement you are using, including milk thistle. This helps to ensure safe and coordinated care.

Why should I use herbal products?

The decision to use herbs to improve your health is, as with all health decisions, a personal one. There are, however, many good reasons to consider herbal products to  complement your own health care methods. One of the best reason, however, may be the fact that herbs and herbal products, continue to provide real health benefits while maintaining a remarkable safety profile. Readily available natural substances were the first medicines used by humans. Primitive and ancient civilizations as well as contemporary cultures throughout the world have always relied on herbs to provide the benefits that have been observed with their use. In fact, the World Health Organization has estimated that 80 percent of the world's population continues to use traditional therapies, a major part of which are derived from plants, as their primary health care tools. In our own time and culture, most herbs are available in the form of "herbal supplements." These products are found in the form of teas, tablets, capsules, liquid extracts, and others. We now have ready access to products that bring the herbal traditions from all over the world in a variety of convenient forms. In addition, scientific inquiries continue to develop our knowledge of the benefits of plants, and often validate the observations made over the past centuries.