The authors observed a 3.4 times higher total soluble phenolic content of parboiled polished rice compared to non-parboiled polished rice. However, differently from the data presented in this study, the authors did not verified increase in total soluble phenolic content in any of the red rice cultivars that they studied. The results presented in Fig. 2A indicates that parboiling process promoted the partial migration of free phenolics from the pericarp to the inner layers of rice caryopsis, which may have prevented the removal of part of those constituents during the polishing treatment.