Why do middle-aged and elderly people need to take blue shell oligosaccharides for a long time?

The human body needs chitosan oligosaccharide to maintain a normal acid-base environment and resist toxic and harmful substances. The ability of self-synthesis of chitooligosaccharides is almost lost after middle age, and the interruption of natural chitooligosaccharides food chain and unhealthy lifestyle make it impossible for people to get the supplement of chitooligosaccharides? The damaged cell sugar chain can not be repaired, leading to various diseases. Middle-aged and elderly people should supplement chitosan oligosaccharide like other nutrients.