I’m trained in aromatherapy (the use of essential oils) and use essential oils a lot.
That Facebook meme makes me stabby.
First of all, what **xnylder **said. Essential oils aren’t essential to our life (although they’re essential to the life of the plant while they’re alive!) they’re any one of dozens of oil or alcohol soluble compounds like phenols and aldehydes and other sciencey stuff. What they all have in common is that they aren’t water soluble (so they got the moniker “oil”, even though none of them are oils) and they have a strong odor.
Odor is a strong but largely unstudied method of tapping your brain. Specifically, your amygdala, the seat of emotionally based memory. So essential oils can be used to alter mood and aid recall of emotional events. They can also be used to help you learn stuff - sniff some rosemary while studying, and you may recall more on your test if you sniff some rosemary during your test.
Some essential oils are good for soothing skin irritation from topical allergies. Lavender and German chamomile are common ones for this. But if you’re allergic to a plant, you run a very high risk of being allergic to its essential oil, so care is warranted.
Some essential oils are good for clearing out nasal congestion from allergies or colds. I’m partial to a combo of grapefruit and eucalyptus for this.
Peppermint essential oil in a great quantity of water, shaken before every sip (remember, not water soluble) is good for upset stomachs, except when it makes them worse. Live and learn. I’ve also had great luck with it - diluted - rubbed on the temples to relieve headaches.
Which leads me to the most important part of this post: essential oils should be well diluted before you put them on your skin. Yes, even peppermint and lavender. We used to say you could use peppermint and lavender “neat” (undiluted) but that’s no longer recommended. Whether it’s because there’s more adulteration in lavender essential oil today, or because every other lotion, potion, soap and shampoo has lavender in it and we’re being overexposed, skin irritation from lavender is increasing in recent years. And peppermint essential oil contains menthol, which at low doses gives skin a cool sensation, and at high doses can cause chemical burns.
Essential oils can be diluted in actual oils, called carrier oils (olive, canola, jojoba, etc.), or in lotion before being applied to the skin. They can be put into a little milk or epsom salts and then into a bath. But never, never, never put them directly on your skin undiluted.