Type of ABC transporter Researcher, year Inhibitors from natural sources
P-gp    
  Kitagawa et al., 2005 Acacetin, Galangin, Myricetin, Morin, Biochanin A and Kaempferol6
  Critchfieldet al., 1994 Apigenin, Fisetin, Rutin7
  Zhu et al., 2001 Tea polyphenols8
BCRP inhibitors    
  Imai et al., 2004 Phytoestrogens (Flavonoids)9
  Ahmed-Belkacemet al., 2007 Shuzhonget al., 2004 Bioeravinones G and H (two rotenoids) from Boerhaavia rotenoids10 Apigenin, Biochanin, Chrysin, Daidzein, Epigallocatechin (EGC), epigallocatechin-3-gallate (EGCG), Fisetin, Genistein, Hesperetin, Kaempferol, Luteolin, Morin, Myricetin, Naringenin, Naringin, Phloretin, Phloridzin, Quercetin, Silibin, Silymarin5
Table 1: BCRP/P-gp inhibitors from natural sources for the reversal of multidrug resistance in cancer.