Used for centuries as an immune system stimulant, scientific research with echinacea confirms that it is a profound immune system stimulant and can therefore prevent the establishment and spread of infections. Its most common use today is for preventing colds and sore throats, or speeding recovery from these infections.Echinacea has been used for centuries as a stimulant to the immune system. Its most common use today is for preventing colds and sore throats, or speeding recovery from these infections. Scientific research with echinacea confirms that it is a profound immune system stimulant and can therefore help prevent the establishment and spread of infections. As an immune system stimulant, the echinacea actives can help the body to increase levels of white blood cells, as well as interferon, interleukins, tumour necrosis factor, antibody activity, and natural killer cell activity. In particular, colds and flu have responded well to echinacea. The stimulation of Echinacea purpurea on the immune system is due to the synergistic action of polysaccharides, alkylamides and cichoric acid.Echinacea Full Spectrum Herb from Webber Naturals is derived from the aerial parts of Echinacea purpurea grown in British Columbia's pristine Okanagan Valley. Reach for this alcohol-free extract at the first sign of a cold or flu or use it as a preventive if you're in contact with people who are coughing and sneezing.