Steaming process of Panax ginseng has been reported to increase its major known bioactive components, ginsenosides, therefore its biological properties compared to regular Panax ginseng. Biological functions of red Panax ginseng attenuating a pro-oxidant environment associated with chronic diseases are of particular interest, since oxidative stress can be a key contributor to the pathogenesis of chronic diseases. In addition, proper utilization of various biomarkers for evaluating antioxidant activities in natural products such as ginseng can also be important providing validity to their activities.