
We found that the low-use red alga Dulse from Hokkaido, Japan is rich in a polysaccharide called xylan, which has a different structure from that of xylan from land plants. In addition, we found that xylooligosaccharides specific to Dulse, prepared by enzymatic degradation of Dulse xylan, showed selective growth-promoting effects on bifidobacteria. Through these studies, we would like to contribute to the development of functional food ingredients that improve people's health.