Structural analysis of water-soluble polysaccharides in the fruiting body of Dictyophora indusiata and their in vivo antioxidant activities

► Water-soluble polysaccharides (DIPs I and II) were purified from the fruiting body of Dictyophora indusiata. ► DIP I was composed of Glc and Man with molecular weight of 2100 kDa. ► DIP II comprised Xyl, Gal, Glc and Man with molecular weight of 18.16 kDa. ► DIP significantly (P < 0.05) decreased the MDA and lipofuscin levels of mice. ► DIP significantly (P < 0.05) increased the SOD and GSH-Px activities of mice.