Grape seeds are waste products of the wine and grape juice industry. However, grape seeds have recently been utilized for the production of seed oil. Grape seed oil (GSO) is generating increased interest as a functional food product since it has been shown to contain high levels of vitamin E, unsaturated fatty acids, and phytosterols.

This study was undertaken to determine the changes in the contents of tocopherols, tocotrienols, and fatty acids in grape seed oils during oxidation. Three different GSOs, soybean oil, and olive oil were stored at 25 or 60 °C for up to 120 days. The peroxide values (PV) and conjugated diene values (CD) of the oils were measured during the storage period to ...

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