Potential mechanism of probiotic fermentation of Auricularia cornea var. Li./blueberry to reduce obesity induced by a high-fat diet

•Fermentation of Auricularia cornea var. Li./blueberry (FACB) changed the composition of intestinal flora in obese rat models.•FACB increased the diversity of intestinal flora.•FACB improved lipid metabolism disorder. The primary objective of this research was to investigate the effects of fermented Auricularia cornea var. Li./blueberry (FACB) on the gut microbiota of these super-large mouse models. The study, found that the groups who were given different amounts of FACB saw a significant reduction in their triglyceride and total cholesterol levels. There was a noteworthy increase in the ranks of high-density lipoprotein cholesterol (HDL-C) (P