Table 1.

Extractions performed and their results in terms of total polyphenols.

Group	Grape quantity used	Extraction process time	Total polyphenols
1	200 g grapes	72 h	264.8 ± 5.8 mg/L
2	200 g peels + seeds	48 h	674.5 ± 9.4 mg/L
3	200 g dried peels Imepa	48 h	4110.3 ± 20.8 mg/L
4	200 g dried and chopped peels Imepa	48 h	9210.4 ± 45.8 mg/L

(Mean value ± dxm = standard deviation of the mean).