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Polyphenols content in the Grape seed and grape skin (September 2016)
| Polyphenols | Grape seed | Grape skin |
|---|---|---|
| Total polyphenols (mg/g GSSE) | 67 | 51 |
| Total flavonoids (mg/g GSSE) | 16 | 14 |
| non-flavonoids (mg/g GSSE) | 51 | 37 |
| Tannins (mg/g GSSE) | 1.22 | 3.43 |
| Anthocyanins (μg/g GSSE) | 0.997 | 0.962 |
