Extraction, isolation, purification, derivatization, bioactivity, structure–activity relationship, and application of polysaccharides from White jellyfungus

White jellyfungus is one of the most popular nutritional supplements. The polysaccharide (WJP) is an important active component of White jellyfungus, it not only has a variety of biological activities but also is nontoxic to humans. So, many scholars have carried out different research on WJP. However, the lack of a detailed summary of WJP limits the scale of industrial development of WJP. Herein, the research progress of WJP in extraction, isolation, structure, derivatization, and structure-activity relationship was reviewed. Different extraction methods were compared, the activity and application of WJP were summarized, and the structure-activity relationship of WJP was emphasized to provide effective theoretical support for improving the utilization of WJP and promoting the application of related industries.