Echinacea is the most relied upon botanical in North America for supporting immune functions. Planetary Formulas Full Spectrum Echinacea Extract combines a concentrated Echinacea angustifolia root extract (standardized to 4% echinacosides) with the roots of Echinacea pallida. This provides a guaranteed percentage of echinacosides (one of the key class of compounds of echinacea), while assuring the presence of the full spectrum of echinacea constituents.