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. 2021 Apr 28;10(5):699. doi: 10.3390/antiox10050699

Table 1.

Proximate composition (% dry matter) of grape seed (GS) and grape skin (GK) meals.

Nutrients g/100 g 1
GS Meal GK Meal
Crude protein (CP) 19.6 ± 0.41 16.3 ± 0.00
Crude fibre 25.4 ± 1.87 14.5 ± 1.33
Neutral detergent fibre (NDF) 52.9 ± 2.36 49.7 ± 0.85
Acid detergent fibre (ADF) 44.6 ± 2.10 41.2 ± 1.08
Acid detergent lignin (ADL) 38.0 ± 1.83 28.3 ± 1.40
Ether extract 7.17 ± 0.31 7.06 ± 0.33
Total extractable polyphenols 7.93 ± 0.60 2.35 ± 0.14
Non-extractable polyphenols 1.15 ± 0.20 1.24 ± 0.10
Gross energy (cal/g) 5062 ± 13.6 4500 ± 19.8

1 Data are the mean of four determinations ± SD.