In recent years, the incidence of glucose and lipid metabolism-related diseases has increased significantly, often accompanied by dysbiosis of the gut microbiota. Mannans, as a class of functional polysaccharides with diverse sources, play an important role in regulating the gut microbiota and impacting host health, garnering widespread attention. This review delved into the structural characterization of glucomannans, galactomannans, and mannan oligosaccharides from various sources, with particular emphasis on the impact of mannans on the gut microbiota and their potential applications in precision nutrition. Studies indicated that mannans could selectively promote the growth of probiotics such as Bifidobacterium and Lactobacillus, while inhibiting the proliferation of pathogens like Escherichia coli, affecting the production of short-chain fatty acids and the metabolism of branched-chain amino acids, thereby optimizing the structure and function of the gut microbiota. The review also summarized the intestinal fermentability of mannans and their health benefits in metabolic diseases such as diabetes, hyperlipidemia, and obesity, offering new intervention strategies for the prevention and treatment of various chronic diseases.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |