Phytochemical Screening and Cytotoxic Properties of Ethanolic Extract of Young and Mature Khat Leaves

Table 2

Cytotoxic activity of the six extracts against three cell lines and one normal fibroblast (MTT 72 h IC₅₀ ± SD μg/mL).

Ethanolic extract of khat	IC50
	MCF7	A2780	HT29	MRC5
N1	29.91 ± 0.03	53.78 ± 7.45	56.58 ± 4.44	30.63 ± 1.59
G1	29.23 ± 0.48	20.97 ± 5.03	59.33 ± 0.74	15.29 ± 2.51
N2	29.34 ± 0.53	52.12 ± 4.41	56.63 ± 6.99	22.94 ± 1.20
G2	51.11 ± 9.05	36.83 ± 2.89	59.41 ± 0.38	36.22 ± 6.31
N3	22.65 ± 3.51	23.74 ± 7.35	51.22 ± 0.28	6.15 ± 0.33
G3	54.90 ± 4.08	38.47 ± 0.19	39.22 ± 0.10	41.48 ± 1.25