Table 2. IC₅₀ (Mean ± SD) Values of the Tested Essential Oils on Cancer Cells (μg/mL)^a.

	IC50 (μg/mL)
sample	A549	PC3	MCF7	U87MG	HEK293
M. spicata	672.13 ± 2.57	206.49 ± 1.48	708.27 ± 2.05	218.86 ± 2.11	ND
M. chamomilla	208.54 ± 1.39	197.52 ± 0.98	315.44 ± 1.17	172.65 ± 1.93	638.79 ± 1.15
colchicine (std)	9.28 ± 1.01	0.98 ± 0.99	52.11 ± 0.85	18.11 ± 1.12	24.53 ± 1.02

^aND: not detected.