Objective To investigate the inhibitory effect of fermentation products of Bacillus megaterium and Bacillus cereus co-cultured with Flammulina velutipes respectively on gastric adenocarcinoma SGC-7901 cells in vitro. Methods F. velutipes was inoculated onto solid fermentation medium(consisting of brewer's grains,bagasse and pear residue at a ratio of 5 ∶ 4 ∶ 1)and cultured for 5 d,then inoculated with B. megaterium and B. cereus respectively,and further cultured for 5 d. The fermentation products were extra...