RAJVIENTERPRISE manufacturer of Mannan Oligosaccharide. Mannan-oligosaccharide is a glucomannoprotein complex derived by enzymatic hydrolysis ofthe inner cell wall of the fungi Paecilomyces spp., Saccharomyces cerevisiaeyeast and Ganoderma Iucidum (reishi mushroom) is a potent immunoactivator. ... Mannan-oligosaccharide works well in conjunction with antibiotics