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. 2021 Dec 22;27(1):50. doi: 10.3390/molecules27010050

Table 5.

IC50 values (μM) determined against ABTS radical cations applied in 50% acetone or methanol (radical solution diluted with ethanol) and buffers of pH 3.6 and 7.4 (radical solution diluted with buffers) after standard and modified reaction times.

Antioxidant 50% Acn + EtOH
6 min		 50% Acn + EtOH
30 min		 MeOH + EtOH
6 min		 pH 3.6
6 min		 pH 3.6
30 min		 pH 7.4
6 min		 pH 7.4
30 min
gallic acid 3.38 2.95 3.53 4.81 3.95 2.93 2.57
ferulic acid 7.40 5.14 6.19 N.A. 1 N.A. N.A. N.A.
catechin 4.43 4.30 4.34 N.A. N.A. N.A. N.A.
quercetin 4.05 3.39 3.95 N.A. N.A. N.A. N.A.
propyl gallate 3.93 3.10 3.98 6.12 4.75 5.96 5.11
glutathione 10.47 5.39 N.A. 52.76 13.34 10.81 8.28
carnosine V.N.D. 2 V.N.D. N.A. N.D. 3 N.D. N.D. V.N.D.
cysteine 31.36 11.73 N.A. 28.53 20.85 19.33 14.16
histidine N.D. N.D. N.A. N.D. N.D. N.D. N.D.
ascorbic acid 11.59 11.82 11.73 13.57 13.53 12.33 12.62
ascorbyl palmitate N.A. N.A. 11.76 N.A. N.A. N.A. N.A.
α-tocopherol N.A. N.A. 11.63 N.A. N.A. N.A. N.A.
Trolox 11.09 10.59 11.10 12.07 12.21 11.98 12.24
phenolic mixture 5.97 3.46 4.51 N.A. N.A. N.A. N.A.
peptide/AA mixture 17.23 12.75 N.A. 75.66 28.99 32.38 21.81
polar mixture 7.95 6.36 N.A. 15.93 15.35 12.46 11.27
applicable compounds mixture N.A. N.A. 5.79 N.A. N.A. N.A. N.A.

1 N.A.—not applicable. 2 V.N.D.—value not determined. 3 N.D.—activity not detected.