Fig. 3.

Hydrolysis of flavonoid glycosides during fermentation. The fermentation was started at time zero having L. plantarum 1 × 10⁷ CFU/mL with DBT herbal extract at 21.6 mg/mL in MRS at 37 °C for various time points, as indicated. The amounts of calycosin-7-O-β-D-glucoside, calycosin, ononin and formononetin were determined by UPLC-MS/MS as in Fig. 1. The relative amount of each flavonoid was shown. Values are in mean ± SD, n = 5. The SD is not shown for clarity