Fermented rice cake (FRC) was prepared from indica rice flour with three kinds of starters (B. custersii ZSM-001, B. custersii ZSM-001+R.oryzae ZSM-003, and Angel yeast and rice koji). The molecular weight distributions of water extracts and gastrointestinal hydrolysates in vitro were determined by gel filtration chromatography. The difference of peptides was studied based on liquid chromatography four stage time of flight mass spectrometry (TOF LC/MS/MS) and the antioxidant activities of gastrointestinal hydrolysates were evaluated. The result...