Herbal medicine silymarin may help sugar-control in people with type II diabetes

October 30, 2006

Diabetes is a growing health problem. Giving antioxidants is recognised as one way of helping people with diabetes to control their blood sugar levels.

The herbal medicine extracted from seeds of the Milk Thistle, Silybum marianum (silymarin) is known to have antioxidant properties and research published this week in Phytotherapy Research shows that this extract can help people significantly lower the amount of sugar bound to haemoglobin in blood, as well as reducing fasting blood sugar levels.

Silymarin contains a number of active constituents called flavolignans which are also used to help protect the liver from poisoning.

"We don't know the exact mechanism of action for this effect, but this work shows that silymarin could play an important role in treating type II diabetes," says lead author Fallah Huseini, who works at the Institute of Medicinal Plants, which is based in Tehran, Iran.

The data came from a randomized double-blind clinical trial involving 51 people who had had type II diabetes for at least 2 years. One group of 25 patients received 200 mg of silymarin three times a day for 4 months, while the remaining 26 received a placebo treatment. All of the patients continued to use conventional oral hypoglycaemic treatment during the trial. Patients were examined at monthly intervals.

Compared with the beginning of the trial, the treatment group had a significant reduction in fasting blood glucose levels (p<0.001), and a reduction in glycosylated haemoglobin (p<0.001). Both of these measures rose significantly in the placebo group (p<0.0001). There were also non-significant decreases in blood lipids in the treatment group.

"The results are very encouraging, and we now need to do further large multi-centre studies," says Huseini.
-end-
Notes to the Editor:

Huseini, H.F: The Efficacy of Silybum marianum (L.) Gaertn. (Silymarin) in the Treatment of Type II Diabetes: A Randomized, Double-blind, Placebo-controlled, Clinical Trial

Phytotherapy Research is an international journal for the publication of original medicinal plant research, focussing on pharmacology, toxicology and the clinical applications of herbs and natural products in medicine. Papers concerned with the effects of common food ingredients and standardised plant extracts, including commercial products, and mechanistic studies on isolated natural products are particularly welcome. Papers and communications range from case studies to full clinical trials, including studies of herb-drug interactions and other aspects of the safety of herbal medicines. Phytotherapy Research can be accessed online at: www.interscience.wiley.com/journal/ptr

John Wiley & Sons Ltd., with its headquarters in Chichester, England, is the largest subsidiary of John Wiley & Sons, Inc. Founded in 1807, John Wiley & Sons, Inc., provides must-have content and services to customers worldwide. Its core businesses include scientific, technical, and medical journals, encyclopaedias, books, and online products and services; professional and consumer books and subscription services; and educational materials for undergraduate and graduate students and lifelong learners. Wiley has publishing, marketing, and distribution centres in the United States, Canada, Europe, Asia, and Australia. The company is listed on the New York Stock Exchange under the symbols JWa and JWb. Wiley's Internet site can be accessed at http://www.wileyeurope.com/

Wiley

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