There are two ways you can use eucalyptus essential oil: through the air or by applying it topically. However, there are some guidelines you'll want to follow. "It needs to be diluted in a carrier oil to be applied on the body and reduce the risk of sensitization on the skin," Gyepi-Garbrah says. "Diffusers are a great way to get the immune-supporting benefits of eucalyptus through inhalation in addition to clearing the air of microbes. A little goes a long way!"
If you don't have a diffuser, you can also put a drop of oil in your bath or shower. And if you are going to use it topically, do a patch test with the carrier oil and eucalyptus oil to check for any allergic reactions, adds Serena Poon, CN, CHC, CHN, chef, nutritionist, Reiki master, and founder of the Culinary Alchemy program. Jojoba, coconut, and argan oils are good options for carrier oils.
It's also important to note that eucalyptus oil is toxic if ingested. Some people might use the oil as a mouthwash. If doing this, Poon advises using careful caution. It's also toxic if ingested by animals, so keep an eye on your pets.