Prairie Doctor Siberian Ginseng - Used for centuries, this herb has shown good results in protection from colds, flus and other ailments such as chronic bronchitis, and is also effective in regulating blood pressure and blood sugar levels. As a recognized adaptogen it has also proven effective in protecting the body from the adverse environmental stresses including radiation, and has beneficial influences on the functions of the adrenals, thymus, spleen, thyroid gland and the liver.