As a reflection of clinical practice, astragalus Is often tested in combination with other herbal medicines. As such, It is difficult from these trials to determine the role of astragalus as a stand-alone treatment. VIRAL INFECTION
Owing to its Immunomodulatary actions, astragalus Is widely used for preventing and treating various viral Infections. A popular use Is as a preventive treatment against common colds and Influenza. To date, scientific evidence Is scant to confirm effectiveness, although one review stated that astragalus has been tested In clinical trials In China, reducing the incidence and shortening the duration of the common cold (Murray 1995).
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