Characterization and antioxidant activities of polysaccharides from Panax japonicus C.A. Meyer

► An average molecular weight of about 6383 Da polysaccharide was obtained from Panax japonicas C.A. Meyer. ► IR spectra indicated the presence of pyranose ring and both them composed of d-galactose and d-glucose. ► The antioxidant activities were investigated employing various established in vitro systems. ► Polysaccharides of Panax japonicas showed antioxidant activities.