Echinacea is one of North America's most celebrated and relied-upon botanicals for supporting the immune system. Planetary Formulas formulator Michael Tierra was largely responsible for bringing this valued botanical back into Western herbal practice after 35 years of disuse. Planetary Formulas Echinacea Extract combines a concentrated whole root extract with additional whole root powder to capture all of echinacea's valuable constituents, delivered in a manner that is easily assimilated.