Carrier oils are vegetable oils derived from the fatty portions of plants, such as seeds, nuts, or kernels. They are used to dilute essential oils and "carry" them onto the skin during aromatherapy or massage. Carrier oils are chosen for their ability to blend well with essential oils and their own therapeutic properties, such as moisturizing, nourishing, and soothing the skin. Popular carrier oils include jojoba oil, sweet almond oil, coconut oil, and olive oil, each offering unique benefits and textures. When selecting a carrier oil, factors such as skin type, sensitivity, and intended use should be considered to maximize the benefits and safety of aromatherapy or topical applications.