Grape seeds can be eaten together with vitamin C. Grape seeds already contain vitamin C. Taking grape seeds together with vitamin C can increase the effect of vitamin C. Grape seeds are leftovers from wineries. After drying, grape skins and grape stems are separated to get the product. Grape seed is rich in amino acids, vitamins and minerals, which has the effect of health care and beauty. Grape seeds contain polyphenols (GPS), mainly catechins and procyanidins. Catechins, including catechins, epicatechin and its gallate, are the main monomers in grape seeds and the constituent units of oligomeric and polymeric proanthocyanidins. Grape seed is rich in oil, accounting for about 12% ~ 15% of its weight. Oil contains a large number of unsaturated fatty acids, of which linoleic acid content is between 58% and 78%. Grape seed also contains a small amount of volatile components, most of which belong to alcohols, phenols and terpenoids, all of which have high biological activity. Grape seed contains crude protein, amino acids, vitamins A, C, E, D, K, P and trace elements such as calcium, zinc, iron, magnesium, copper, potassium, sodium, manganese and cobalt.