What are essential oils? How can you use them? In this helpful guide you’ll find a lot of recipes and ways to use essential oils for your wellness, beauty and for a healthier life. There are three significant ways to use essential oils: internally, aromatically and topically. Every essential oil has differing requirements regarding how to use it. Make sure that you read about an essential oil before using it. These oils have a million and one uses, and it is from these that some recipes are derived.