Replacement for Echinacea Blend: Echinacea has been used successfully for hundreds of years to support immune health. * Gaia Herbs’ Echinacea purpurea is grown on Gaia’s own certified organic farm. Concentrated for a fast-acting response, Echinacea contains the full spectrum of Echinacea phytochemicals — including isobutylamides, the constituents most effective at supporting a healthy immune response.*