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MEDICAL: DISEASES: COMMON COLD
Echinacea No Big Impact On Common Cold
Echinacea No Big Impact On Common Cold
Main Category: Flu / Cold / SARS
Also Included In:
Complementary Medicine / Alternative Medicine;
Nutrition / Diet
Article Date: 21 Dec 2010 - 2:00 PST
Medical News Today
http://www.medicalnewstoday.com/articles/212112.php
Although popular as an over-the-counter herbal treatment for the common
cold, researchers say echinacea has no big impact and only reduces
duration of symptoms by half a day at the most.
Lead researcher Dr Bruce Barrett, an associate professor of family
medicine at the University of Wisconsin-Madison School of Medicine and
Public Health in Madison, Wisconsin, USA, and colleagues, published their
findings in the 20 December issue of Annals of Internal Medicine.
The botanical genus Echinacea, also known as purple coneflower, is a wild
flower that is native to North America, where indigenous peoples have used
it in various forms for a variety of illnesses. It became popular as a
remedy for respiratory infection and other illnesses in the rest of the
world after early research was done in Germany in the 1920s, wrote the
authors.
Most commercially available echinacea products are made primarily from 2
species: Echinacea purpurea and E. angustifolia. Echinacea has been used
in homemade remedies in the form of teas, dried herb and liquid extracts,
and a supplement form is available as capsules sold in drug and retail
stores. For this study, the researchers used a root-based preparation of
the herb.
Barrett and colleagues wrote in their introduction that by the mid 1990s
there were several hundred published studies on echinacea, including over
a dozen randomized trials, nearly all reporting benefits for treating the
common cold, but all were "manufacturer-sponsored and of moderate to poor
quality".
Since then there have been several trials, some with positive results, and
some with negative results, including one by Barrett and his team, which
also produced negative results. Systematic reviews on these studies also
varied in their results and interpretation.
"We designed and conducted this trial because the effectiveness of
echinacea was still unclear," wrote the authors.
The complete article may be read at the URL above.
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