While most essential oils on the market should not be taken internally (and this warning is usually on the label), certified pure oils are labeled as dietary supplements and are safe for internal use, in small quantities. You can use mild oils by putting a drop under the tongue or in water, however, hot oils should be taken in capsules. They can also be diluted with a carrier/vegetable oil or taken with food. Many oils may be used in cooking recipes for flavoring and/or therapeutic benefit. My husband makes some awesome peppermint brownies!
Pregnancy & Nursing.
Oils applied topically at ordinary levels should be safe for a developing fetus, however, please use caution with essential oils during pregnancy. Popular oils that are generally considered safe to use during pregnancy include bergamot, lavender, lemon, geranium, ginger, sandalwood, wild orange and ylang ylang. Other oils may also be suitable; please consult your healthcare provider if you have questions or concerns.
We do recommend avoiding clary sage until delivery. Fennel can help support a normal milk supply, while use of peppermint can reduce milk supply in some mothers, so you may want to avoid internal use of peppermint (and blends containing it) in the weeks prior to delivery and while nursing. Additional oils may be helpful during and after delivery.
Diffusing around pets.
When diffusing oils around pets, make sure that the door to the room is open and the pet is free to leave. Most of our furry friends enjoy the oils and can benefit from them, but your pet must to be able to move away from the diffuser when they need a break. Avoid using melaleuca (tea tree) on/around cats. The book SpOil Your Pet by Mia K Frezzo & Jan C Jeremias is a great resource for guidance on using oils with your pets.
Essential oil and bath water.
One common application method is in a bath. When using undiluted oil in bath water, you will want to use a dispersing gel (bath/shower gel can work) to prevent oil from pooling as a concentrated drop in the water, which could then irritate your skin. Also note that oils will evaporate quickly in very hot water.
Additional Essential Oil Safety CAUTIONS:
Persons with conditions such as asthma, epilepsy, high blood pressure, or other critical health conditions can definitely benefit from essential oils to support their overall health & wellness goals, but may want to consult a healthcare professional. In general, individuals with epilepsy should be cautious with or may want to avoid: Rosemary, fennel, sage & eucalyptus.