oil marked as "USP" also meets the standards of the U.S. Pharmacopeia. Varieties True carrier oils are generally cold-pressed or macerated vegetable oils taken from, among others: Apricot oil Grape seed oil Avocado oil Olive oil Sesame oil Evening primrose oil Canola (rapeseed oil) Camellia seed oil Sunflower oil Marula oil Jojoba oil Emu oil Castor oil Borage seed oil Nuts: Walnut oil Peanut oil Pecan oil Macadamia oil Fractionated coconut oil Hazelnut oil Cocoa butter Sweet almond oil Safety aspects Peanuts are legumes, not true nuts, but they share with true nuts the risk of causing allergic reactions, even in minute amounts. Pure peanut and nut-derived oils are not usually allergenic (as they do not typically contain the proteinaceous part of the plant), but avoiding them may be safer, as serious peanut and nut allergy is widespread, oil purity cannot be guaranteed, and other hypoallergenic oils are easily substituted. References Aromatherapy Oils