Table 2.

Linear regression and IC₅₀ of hydroxycinnamic acids in the antioxidant capacity assays and the inhibition of erythrocyte hemolysis.

HCA	DPPH			ABTS			% Hemolysis inhibition
	Equation	R 2	IC50	Equation	R 2	IC50	Equation	R 2	IC50
Caffeic	y = 0.9853x + 13.642	0.881	0.20	y = 0.7799x − 3.0388	0.987	0.38	y = 0.3242x − 93.957	0.942	2.46
p-Coumaric	y = 0.0182x + 12.404	0.892	>7.5	y = 0.8509x + 11.521	0.938	0.28	y = 0.1114x − 33.291	0.978	4.55
Ferulic	y = 0.3624x + 5.4449	0.934	0.63	y = 0.8674x + 1.7052	0.986	0.29	y = 0.1331x − 15.528	0.929	2.54
Sinapic	y = 0.5561x + 2.9464	0.987	0.38	y = 0.6816x − 1.2081	0.975	0.34	y = 0.2012x + 20.052	0.976	0.66

HCA: hydroxycinnamic acid; IC₅₀: half of the maximum inhibitory concentration, expressed as μmol of HCA/mL.