High antioxidant activity was found in the studied seeds
extracts (GSEJ and GSEW). We found important amounts of TPC,
total flavanols, catechins and epicatechins. The transition of
phenolic compounds from the seed to the wine while winemaking
made that GSEW exhibited lower amounts of the studied
compounds. The provided information in this research work will be
useful to seek the natural potential of grape seeds regarding the
contents of these biologically-active polyphenols