Table 1.

CI₅₀ values ^a of bioactive anticarcinogens by single or two-way combination treatment in MCF-7 and MDA-MB-231 human cancer cells.

	Combined Treatments	CI Value at Inhibition of 50%
MCF-7	Genistein + Daidzein	2.02 ± 0.30
	Genistein + Glycitein	1.86 ± 0.22
	Genistein + Genistin	1.53 ± 0.33
	Genistein + Daidzin	1.52 ± 0.18
	Daidzein + Glycitein	1.68 ± 0.44
	Daidzein + Genistin	1.69 ± 0.31
	Daidzein + Daidzin	1.89 ± 0.23
	Glycitein + Genistin	1.92 ± 0.58
	Glycitein + Daidzin	1.01 ± 0.10
	Genistin + Daidzin	0.89 ± 0.12
MBA-MD-231	Genistein + Glycitein	1.30 ± 0.08
	Genistein + Genistin	0.56 ± 0.13
	Genistein + β-Sitosterol	0.54 ± 0.20
	Glycitein + Genistin	1.05 ± 0.10
	Glycitein + β-Sitosterol	1.29 ± 0.07
	β-Sitosterol + Genistin	0.45 ± 0.12

^a The combination index at inhibition of 50%.