Grape (Vitis vinifera) seeds, a by-product of winemaking, can give oil and a subsequent by-product flour rich of phenolic compounds. Since grape seeds are usually discarded as part of the wine making process, the extraction and sale of grape seed oil and grape seed extract can be a profitable sideline, as well as an efficient use of by-products. Grape seed oil is known for its beneficial nutritional value owing to its high content of linoleic acid (ca. 72%). It can be used to fry foods (it has a very high smoking point) or to be included in dressings and sauces, or in cosmetics since it has moisturizing properties on the skin. Because each seed yields a small amount of oil, grape seed oil is usually extracted by solvent