Many recent scientific studies verify that a number of treatments work. Natural treatments enhance the body's natural defenses and can therefore work toward prevention as well as cure. One of the best known agents in this regard is Echinacea. Over 400 studies performed around the world have proven the effectiveness of this native American plant for the treatment of mild infections.
Standardized preparations offer the most consistently potent formulas.
It can be used in both prevention and treatment. While Echinacea is safe for most, people with immune disorders may wish to consider alternatives. Zinc blocks cold viruses from attaching to cells of the respiratory tract and therefore can block both severity and duration of cold symptoms. Zinc should be used only for short term treatment of symptoms, for not more than ten days. It should not be used for prevention.