Table 2. The growth inhibitory concentrations (IC₅₀/) of fir (Abies alba Mill.) honeydew honey that inhibit the normal human skin fibroblasts (BJ), cervical carcinoma (HeLa), breast epithelial adenocarcinoma, metastatic (MCF-7), colorectal metastatic adenocarcinoma (SW620), pancreatic carcinoma derived from metastatic liver (CFPAC-1) and pancreatic carcinoma (MIA PaCa-2).

Honey sample	IC50/(mg/mL)
	Cell line
	BJ	HeLa	MCF-7	SW620	CFPAC-1	MIA PaCa-2
1	4.50	18.51	13.27	12.01	19.98	17.67
2	4.44	19.03	10.54	13.55	19.63	16.83
3	5.12	17.50	11.54	7.96	19.15	16.80
4	4.64	16.34	9.94	10.06	18.29	16.72

IC₅₀=concentration required for inhibition of tumour cell proliferation by 50%