Grape Leaf Extract Polyphenols EnglishNAME Grape Extract COMMON NAME Red Wine Extract, LATIN NAME Vitis vinifera PART USED Leaf Specification 40%Polyphenols(UV) Grape (Vitis vinifera)is grown in warm, temperate regions of the world. It produces clusters of pale green flowers. The fruit has green, yellow or reddish-purple skins and two to four seeds inside the pulpy flesh.