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Ann Gregory
Med J Aust 2005; 183 (5): 272.
Published online: 5 September 2005

Is echinacea effective against the common cold? Not likely, according to a US expert who laments that further trials of implausible remedies are continuing because of their public popularity rather than some reasonable chance of efficacy.1 Sampson was commenting on a placebo-controlled study sponsored by the US National Center for Complementary and Alternative Medicine (NCCAM) which found three extracts from Echinacea augustifolia roots ineffective in preventing and/or treating a cold in about 400 healthy, young adult volunteers inoculated with rhinovirus type 39.2 The NCCAM is reported to have three more clinical trials of echinacea currently under way.

  • Ann Gregory


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