25.10.2012 Functional food sera is the first food manufacturer to launch different foods with new functional compositions. Innovation: Foods with MOS The sera vipan, sera san, sera flora and sera GVG mix foods are available with so-called mannan oligosaccharides (MOS) from now on. MOS are prebiotically active cell wall components of a certain yeast strain that support intestinal health in a natural way. MOS work in many ways: Being prebiotics, they reduce the growth of pathogenic bacteria, contribute to immunity development (while under stress) and improve food and nutrient utilization, among others. In brief: The fish being kept feel better due to using MOS in sera foods. The functional foods are a crucial measure for maintaining the health of the animals. The fish become ill less frequently, infections run less severely and the convalescence phase becomes shorter.