What is the most toxic essential oil?
Rachel Ellis
Published Jan 22, 2026
The essential oils most frequently involved in poisoning calls were eucalyptus (2049, 46.4 percent), tea tree (749, 17.0 percent), lavender (271, 6.1 percent), clove (179, 4.1 percent), and peppermint oils (154, 3.5 percent).
What essential oils should you avoid?
Popular essential oils that should never be used on or around infants and children:
- eucalyptus.
- fennel.
- peppermint.
- rosemary.
- verbena.
- wintergreen.
Can essential oils be toxic?
Essential oils are not safe to consume and can cause significant poisoning even if small amounts are ingested. The Western Australian Poisons Information Centre (WAPIC) has recorded an increase in poisonings as a result of essential oil ingestions in children.
How much essential oil is poisonous?
"The onset of toxicity can be rapid, and small quantities (as little as 5 millilitres) can cause life-threatening toxicity in children," the researchers write in their report.
Is lavender oil toxic to humans?
Lavender oil is generally not poisonous in adults when breathed in during aromatherapy or swallowed in smaller amounts. It may cause a reaction in children who swallow small amounts. The major effects are due to allergic reactions of the skin.
39 related questions foundIs Thieves oil poisonous?
In fact, eucalyptus oil, which is a component of thieves oil, can be toxic when ingested.
Is peppermint oil toxic?
Like many essential oils, peppermint oil can be toxic and even lethal at excessive dosages; it has been associated with interstitial nephritis and acute renal failure.
Which essential oils are toxic to humans?
Highly toxic essential oils include camphor, clove, lavender, eucalyptus, thyme, tea tree, and wintergreen oils, the researchers noted. Many essential oils can cause symptoms such as agitation, hallucinations and seizures.
Is frankincense poisonous?
Frankincense is natural, but like many other natural substances, it can be poisonous. Some people who have used frankincense extract have experienced: stomach pain. nausea.
Has anyone died from using essential oils?
March 3, 2022 -- A lavender aromatherapy spray, which was imported from India and sold at Walmart last year, was contaminated with a deadly bacteria that led to four illnesses, including two deaths, according to a new report published in TheNew England Journal of Medicine.
Is diffusing essential oils safe for your lungs?
External use of an essential oil probably won't put you at risk for anything, unless you happen to have allergies. So, if the scent of lavender wafting through the air helps you relax and unwind—and you don't notice any other problems—it's probably OK for your lungs to use essential oils, Dr. Buhr says.
Can you overdose on lavender essential oil?
If you experience nausea, vomiting, or a headache after using lavender, discontinue use immediately. Because consuming lavender essential oil can have toxic effects, this remedy should not be ingested unless under the supervision of a medical professional.
Is eucalyptus oil poisonous to inhale?
Eucalyptus oil can be inhaled through your nose and may provide some cold symptom relief. It's also found in many topical decongestants. However, because even small doses of the oil can be toxic, you should avoid consuming it ( 9 ).
Are there any oils you shouldn't mix?
Essential oils such as thyme, oregano, clove, and cinnamon bark are examples of this. Several citrus oils, including bergamot, lemon, lime, orange, and angelica, can induce photo toxicity (severe burns or skin cancer) if exposed to natural sunshine or sun-bed radiation after skin application, but not when inhaled.
Is lavender a hormone disruptor?
Lavender oil and tea tree oil contain compounds that mimic or oppose the actions of sex hormones and may be considered endocrine disruptors. Persistent exposure to lavender products is associated with premature breast development in girls, according to new research by NIEHS scientists.
Are diffusers harmful?
Diffusers emitting a lovely, nose-pleasing aroma may seem benign, but can be unsafe since it uses water vapour to diffuse tiny oil droplets into the air. Inhaling diffused oils is known to cause negative respiratory effects on humans and pets, if used in a small space and/or for an extended period of time.
Why is frankincense the king of oils?
Frankincense has earned its title as “The King of Oils” because of its versatility. When used topically, frankincense touts powerful anti-aging properties. It promotes cellular function and the appearance of healthy-looking skin, evening out skin tone and minimizing blemishes.
What is mur used for?
In foods and beverages, myrrh is used as a flavoring component. In manufacturing, myrrh is used as a fragrance, in incense, and as a fixative in cosmetics. It is also used in embalming. Coronavirus disease 2019 (COVID-19): Some experts warn that myrrh may interfere with the body's response against COVID-19.
Who should not take Boswellia?
It's important to talk to your healthcare provider before using Boswellia. 9 If you have gastritis or gastroesophageal reflux disease (GERD), you may not be able to take the herb. If you're taking a blood thinner or have a condition that affects blood clotting, talk to your healthcare provider before taking Boswellia.
Is sage oil toxic?
When sage essential oil was administered in clinical trials, it has been at low amounts under tight controls for extraction and dilution since ingesting it carries a risk of poisoning. Even very small amounts of sage essential oil, when ingested by children, has been known to cause seizures.
Is breathing peppermint oil safe?
Peppermint oil should be kept away from children and infants as it may trigger breathing issues. The oil, in large doses, may also lead to seizures and harm the digestive system. It is also unsafe for the lungs and pregnant and lactating women. Caution is highly advised.
Is smelling peppermint oil safe?
Peppermint oil in a gel, water, or cream applied topically to the nipple area of breastfeeding women might be helpful for reducing pain and cracked skin. Menthol, which is in peppermint oil, should not be inhaled by or applied to the face of an infant or small child because it may negatively affect their breathing.
Who should not use peppermint oil?
People with a specific enzyme deficiency, called G6PD deficiency, should avoid using peppermint as an extract or oil in aromatherapy. People taking certain medications. Peppermint oil aromatherapy can inhibit an enzyme called CYP3A4, which is responsible for breaking down many types of medication.
Why is Thieves oil called Thieves?
The thieves applied a mixture of several herbs, spices, and essential oils on their clothes and bodies that would allow them to rob ailing people without catching the illness. Because it was believed to be first used by thieves, the mixture of essential oils got the name “thieves oil.”
Is clove oil toxic to humans?
Potential Risks of Clove Essential Oil
In high enough doses, it is toxic to humans. Case studies have been reported involving the ingestion of toxic amounts of clove oil (10-30 ml, or roughly 2-6 teaspoons). Symptoms include agitation, declining consciousness, and coma.