Rhizoma, and Psoraleae Semen, at least partially inhibited the
synthesis of water-insoluble glucans, although Notoginseng
Radix and Perillae Rhizoma did not inhibit the growth of oral
bacteria. These results suggest that Notoginseng Radix and
Perillae Rhizoma may reduce the synthesis of water-insoluble
glucans by inhibiting the enzymatic activity of the S. mutans
GTase rather than by inhibiting bacterial growth