Grapeseed oil is high in polyunsaturated fatty acids (PUFAs), mostly omega-6 fatty acids. PUFAs may be beneficial to your heart if they are used in place of saturated fats and trans fats in your diet.
Grapeseed oil is a good source of vitamin E, even more so than olive oil. Vitamin E is a vitamin that works as fat-soluble antioxidant, which helps protect your cells from damaging free radicals.