Table 2.

α-Amylase inhibitory activities of the crude extract and solvent fractions of H. abyssinica.

Concentration	Percentage (%) inhibition
	Chloroform fraction	Ethyl acetate fraction	Water fraction	Crude extract	Acarbose
15.6 μg/ml	4.58 ± 0.68	7.65 ± 0.88	10.54 ± 0.99	12.64 ± 0.85	19.52 ± 0.76
31.3 μg/ml	9.36 ± 0.59	15.68 ± 0.67	18.54 ± 0.67	22.51 ± 1.64	32.68 ± 0.66
62.5 μg/ml	19.65 ± 1.57	29.54 ± 0.49	30.54 ± 0.57	36.25 ± 0.58	44.78 ± 1.18
125.0 μg/ml	32.58 ± 0.96	41.25 ± 1.34	45.58 ± 1.28	44.65 ± 0.67	60.54 ± 0.67
250.0 μg/ml	46.95 ± 0.72	52.36 ± 0.75	59.54 ± 0.87	65.67 ± 0.93	79.35 ± 0.91
500.0 μg/ml	56.87 ± 0.49	61.57 ± 0.49	68.24 ± 0.67	74.52 ± 0.80	93.34 ± 0.58
IC50 μg/ml	21.57 ± 1.03	18.73 ± 0.87	16.31 ± 0.54	14.52 ± 0.94	9.82 ± 0.77

Note: each value of percent inhibition of α-amylase is presented as means ± SEM (n = 3). Abbreviations: SEM: standard error of mean; IC₅₀: half-maximal inhibitory concentration.