A carrier oil is a type of oil that is used to dilute concentrated essential oils so that they can be applied to the skin without causing side effects. Essential oils are potent and can cause irritation when applied directly to the skin, so carrier oils are used to "carry" them into the skin. Carrier oils are usually vegetable oils, such as coconut oil, jojoba oil, and avocado oil, that are derived from the seeds, kernels, or nuts of a plant. They are rich in vitamins, minerals, and fatty acids that are nourishing and safe to put directly onto the skin. Different carrier oils have different properties and uses, so its important to choose the right one for your needs. When choosing a carrier oil, consider factors such as odor, absorption, and skin type. Its also important to buy therapeutic-grade carrier oils from a trusted manufacturer that are cold-pressed, 100 percent pure, and additive- or preservative-free. Some popular carrier oils include coconut oil, jojoba oil, sweet almond oil, grapeseed oil, and avocado oil.