A carrier oil is a neutral oil used to dilute essential oils before applying them to the skin. This is important because essential oils are highly concentrated and can cause irritation if used directly. Common carrier oils include coconut oil, jojoba oil, and sweet almond oil. They help to safely deliver the benefits of essential oils while also providing their own moisturizing properties. Carrier oils are derived from the fatty portions of plants, such as seeds, nuts, or fruits. They are often used in aromatherapy, massage, and skincare products. By mixing essential oils with a carrier oil, users can enjoy the therapeutic effects without risking skin sensitivity or adverse reactions.