GRAPE SEED OIL  limit all to one ounce per day. Grape seed oil has a higher smoking point so it is useful for high heat frying. Caution it is high in PUFAs, in polyunsaturated fatty acids. This occurs in high heat processing of grape seeds, soy, corn sesame seeds. PUFAs directly interfere with the functioning of the thyroid gland. PUFAs are at their absolute worse when they are chemically solidified at room temperature.