Table 4.

The calculated IC₅₀ values of the antioxidant activity of (−)-epicatechin tested in the range of 0.1–1000 µM or 0.029–290 µg mL⁻¹ over time.

	0 h	2 h	4 h	6 h	8 h	24 h	50 h	7 d	14 d
IC50 (µM)	6.298	4.967	4.738	5.539	6.393	4.949	5.129	6.280	4.190
IC50 (µg mL−1)	1.828	1.442	1.375	1.608	1.856	1.436	1.489	1.823	1.216
LogIC50	0.799	0.696	0.676	0.744	0.806	0.695	0.710	0.798	0.622
LogIC50 std. error	0.039	0.040	0.047	0.045	0.043	0.044	0.041	0.052	0.039
Hillslope	1.690	1.427	1.282	1.441	1.669	1.315	1.367	1.375	1.538
Hillslope std. error	0.176	0.110	0.106	0.134	0.188	0.107	0.109	0.153	0.112