Walnut nut Extracted from the fruit of walnut nut, this oil is extensively praised among the users owing to its rich content of alpha-linolenic acid, polyunsaturated fatty acids, linoleic acid and oleic acid. It is considered as the most beneficial oil for use over skin due to its moisturizing nature. Use of this oil over the skin helps to fight-off the conditions of wrinkles and aging. Just add few drops of this oil in your regular moisturizing cream and see the benefits. Besides, this oil also works the best when it comes to prevent hair loss and dandruff.