. 2019 Aug 18;8(8):317. doi: 10.3390/antiox8080317

Table 5.

Correlation coefficients (R²) of the dependence of the antioxidant activity of 26 dietary supplements on the concentration of silymarin constituents and overall silymarin.

Assay	Silymarin Constituents
Assay	taxifolin	silychristin	silydianin	silybin A	silybin B	isosilybin A	isosilybin B	2,3-dehydrosilybin	Sum of Silymarin Constituents
ABTS	0.159	0.402	0.453 ^a	0.530 ^a	0.527 ^a	0.493 ^a	0.417	0.087	0.520 ^a
ORAC	0.685 ^a	0.813 ^a	0.617 ^a	0.497 ^a	0.571 ^a	0.774 ^a	0.745 ^a	0.553^a	0.652 ^a
DPPH	0.472 ^a	0.219	0.014	0.092	0.110	0.127	0.093	0.160	0.133
CAA	0.055	0.054	0.366	0.058	0.062	0.111	0.144	0.139	0.098

^a Correlation coefficient confirms (α = 0.05) that the results of antioxidant assay linearly depend on the concentration of silymarin constituents or overall silymarin (ABTS df = 19, critical value = 0.433; ORAC df = 20, critical value = 0.423; DPPH df = 15, critical value = 0.448; CAA df = 14, critical value = 0.497).