A carrier oil is a vegetable oil used to dilute essential oils before applying topically. They help “carry” the essential oils into the skin. Example carrier oils include coconut, almond, jojoba, grapeseed, and olive oils. Each oil has different attributes and shelf life.
A carrier oil does NOT decrease the effectiveness of an essential oil!
Using a carrier oil aids absorption when applying topically. Without a carrier oil, a larger percentage of the essential oil evaporates in the air. I use different carrier oils in different homemade recipes. For example, I use jojoba oil in my face moisturizer, tamanu oil on my daughters eczema, and coconut oil in my whipped shea butter. Your choice is totally based on your preference. I use many kinds and am currently ordering a few new carrier oils to see what they are like. Learn more at: https://www.naha.org/explore-aromatherapy/about-aromatherapy/most-common-base-oils-used-in-aromatherapy/