Additional file 1. Supplementary file: Fig. S1: Accumulated body weight gains of rats from week 1 to week 9, Fig. S2: Macroscopic and microscopic observations of rat stomach tissue, Fig. S3: Effects of Lycium barbarum polysaccharides (LBP) and/or C-phycocyanin (CPC) on inflammatory markers in stomach tissues, Fig. S4: The taxa distribution of rat gastric microbiota, Fig. S5: Beta diversity of gastric microbiota, Table S1: Correlation coefficients between the relative abundance of the genus Bifidobacterium and the levels of gastroprotective factors in the stomach.