Echinacea has a long history of use in herbal medicine to help support lowered immune system function. It can be taken at the first sign of a cold to significantly shorten the duration and intensity of symptoms, or preventatively to reduce the odds of developing an upper respiratory tract infection (URTI) in the first place. Natural Factors’ line of certified organic ECHINAMIDE® products are standardized to Echinacea purpurea’s three active compounds and are clinically shown to support immune function.