Echinacea

Echinacea is an herb that seems to help the immune system.  I have found that taking 2-3 full droppers of liquid extract per day has prevented me from having a lot of severe colds during winter.  It will not stop a full-blown case of the flu, though.  I recommend a flu shot or Tamiflu for influenza.  Echinacea can still be helpful in minor problems.  I have also read that echinacea can help in cancer prevention.  It is definitely an herb worth trying.