Essential oils can be used by most people. I always take care to dilute the oils properly,
especially when using the oils on children and the elderly because their skin is thinner than the typical adult.
Many essential oils are “Generally Recognized as Safe” or GRAS by the FDA. Find that list here: GRAS list FDA
Expectant and breast-feeding mothers should always consult with their doctors before using essential oils. However, there are many resources available for mothers!