Table 1.

Polyphenol content (mg/kg dry weight) of grape seed pomace of four different grape varieties harvested in the Villány wine region.

	Blue Portugal	Syrah	Pinot Noir	Cabernet Sauvignon
resveratrol (mg/kg)	7.11 ± 0.44 ABC	19.02 ± 0.17 ADE	37.93 ± 2.78 BDF	15.04 ± 0.41 CEF
rutin (mg/kg)	9.37 ± 0.64 aA	8.81 ± 1.56	7.98 ± 0.52 ab	6.74 ± 0.37 Ab
quercetin (mg/kg)	34.17 ± 2.35 A	38.52 ± 1.11 Ba	33.09 ± 0.88 Ca	15.69 ± 0.80 ABC

Means in a row sharing common Roman superscript denote significant differences between the grape varieties: ^a,b p < 0.05; ^A,B,C,D,E,F: p ≤ 0.001.