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American Ginseng reduces blood sugar: implications for diabetes and herbal research

Researchers at St. Michael's Hospital and the University of Toronto have found that taking American ginseng before a meal reduces blood sugar in people both with and without diabetes. The study appears in the April 9 issue of the Archives of Internal Medicine, a publication of the Journal of the American Medical Association (JAMA).

Dr. Vladimir Vuksan, lead investigator for the study, says that these findings may have important implications for the treatment and prevention of diabetes, a disease affecting approximately eight per cent of North American adults and continually rising. "Although preliminary, these findings are encouraging and indicate that American ginseng's potential role in diabetes should be taken seriously and investigated further. Controlling after-meal blood sugar levels is recognized as a very important strategy in managing diabetes. It may also be important in the prevention of diabetes in those who have not yet developed the disease."

Study participants, both diabetic (Type 2) and non-diabetic, consumed capsules containing three grams of ground Ontario-grown American ginseng either 40 minutes before or during a glucose test meal. Among participants with Type 2 diabetes, those who took the ginseng capsules experienced a 20 per cent reduction in blood sugar levels compared to when they took placebo capsules. Among non-diabetic participants, similar reductions were only seen when the ginseng capsules were taken before, not together, with the test meal, suggesting that the timing of administration may be important. (The trial was an acute clinical study and did not compare the diabetic participants to the non-diabetic participants.)

Although the results are encouraging, Vuksan, who associate director of the Risk Factor Modification Centre at St. Michael's Hospital and assistant professor in the department of nutritional sciences at the University of Toronto, cautions that people should not us
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Contact: Steven de Sousa
steven.desousa@utoronto.ca
416-978-5949
University of Toronto
8-Apr-2000


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