Immunogenic compositions, cancer vaccines and methods for treating cancer comprising FMS, the fucose-enriched polysaccharide fraction from Reishi F3, are provided. Compositions comprise fucose-enriched Reishi polysaccharide fraction (FMS) MW=˜35 kDa, wherein the FMS is isolated by size-exclusion chromatography from Reishi F3, and the FMS comprises polysaccharides having primarily a backbone selected from 1,4-mannan and 1,6-α-galactan, wherein the backbone is linked to a terminal fucose-containing side-chain Immunogenic compositions comprising glycolipid adjuvants are provided. Antibodies generated by immunogenic compositions disclosed herein bind cancer cells comprising antigens Globo H, Globo H, Gb3, Gb4, Gb5 (SSEA-3) and SSEA-4 on the cell surface.