In general, the side effects of essential oils include: Skin sensitivity (rash, reactions, burns, sores) Photosensitivity (some oils are not ok under sunlight) Problems for pregnant or nursing women (list of unsafe EOs for pregnancy here)
And yes, essential oils are (for the most part) all natural and they do have. Even inhaling some oils can cause side effects for people with health problems.
Essential oils have been shown in studies to have very few negative side effects or risks when they are used.
I see it on advice columns with lines such as â€œboost your healthâ€ or â€œprevent cancer. Who is giving this advice to take essential oils internally?. If you store it in a cool, dark space you can anticipate that this bottle will have a shelf life of around. Essential Oil Safety: A Guide for Healthcare Professionals, Tisserand & Young