Table 1.

Summary of IC50 values upon treatment of breast cancer cells MDA-MB-231 and MCF7 with a range of concentration (0-50 μM) of beta- or gamma-tocotrienols for 24 and 48 h.

	Beta-Tocotrienol IC50 (μM)		Gamma-Tocotrienol IC50 (μM)
	24 h	48 h	24 h	48 h
MDA-MB-231	30.0 ± 1.8	21.1 ± 2.8	39.0 ± 5.5 *	31.0 ± 3.9 **
MCF7	30.5 ± 2.3	24.3 ± 1.3	41.1 ± 3.9 **	32.9 ± 3.6 **

Values are presented as averages ± SD. * and ** indicate for each cell line significance between mean values of IC50 of the two different treatments and after the same time duration, respectively if p < 0.05 and p < 0.001.