afc97589_Health_Information_Library__Why
[Used for] 2 Stars Infection 3 to 5 ml of liquid herbal extracts every two hours, or 300 to 600 mg of powdered herb three times per day, or 5 to 6 cups of tea daily [Why] 
Echinacea is both immune supportive and antimicrobial. In general, human studies have found that echinacea taken orally stimulates the function of a variety of immune cells, particularly natural killer cells.18
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