Polysaccharides are linked by the glycosidic bond of more than 10 monosaccharide molecules. They have relatively large molecular weights and are usually composed of hundreds to thousands of monosaccharide units. Nucleic acids, proteins, lipids, and polysaccharides are considered the four essential substances of life, playing crucial roles in numerous biological activities, including immune regulation, anti-tumor effects, reduction of blood glucose and blood lipids, antiviral activity,
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