Benefits of Grape Seed Oil for the skin. Grape seed oil treats acne, corrects dark circles, tightens skin, shrinks pores and reverses signs of aging. It is also a natural moisturizer with none of the harsh chemicals found in many over-the-counter beauty products. In addition to healthy fatty acids and vitamin E, grape seed oil is rich with anti-inflammatory antioxidants that help reverse free radical damage and reduce acne and facial redness. The linoleic acid in grape seed oil helps strengthen cell membranes and also fights acne and pimples. The astringent in grape seed oil tightens skin and shrinks pores. The combination of astringent and moisturizing properties helps tone skin and reduce dark circles under eyes. This tightening effect also helps reduce wrinkles and fine lines. This light oil rarely causes an allergic reaction and is safe to use on sensitive skin. It is quickly absorbed into the skin and can start producing results in as little as two weeks. Grape seed oil is applied to the skin by using the pads of the fingertips to rub the oil lightly on the face and body. Grape seed oil can be applied cold or as a hot oil treatment. It can also be added to other moisturizing products such as whipped butter.