4 Essential Oils NOT RECOMMENDED for use around children under 12.
Young children’s immune systems have not fully developed and they are overall less able to deal with adverse effects when concentrated substances, such as essential oils, are used in the air around them (via diffusion).
Peppermint, Eucalyptus, and certain chemotypes of Rosemary contain high amounts of menthol or 1,8-cineole which can cause slowed respiration in some children. Because of this, it is recommended that Peppermint not be diffused around or applied to the skin of children under age 6, and Eucalyptus is to be avoided on or around children under age 10. You can read more about menthol-containing essential oils and children here.