Essential Oils by Wellness Goal
What research shows for essential oils and common goals such as sleep, anxiety, headache, nausea, skin and hair, with an evidence label and a link to every goal page.
Content last updated . This page has not been medically reviewed.
Safety first. Natural products can cause side effects and interact with medicines. Read essential oil safety before you use anything on this page.
This page is the front door to our goal guides. For each goal (sleep, anxiety, headache, nausea, pain, colds, skin, hair, insects, focus, dementia, menopause, breathing and weight claims) it says where to read more and, where we have checked the sources, what the research found. It does not promise benefits. No essential oil is shown here to cure, treat or prevent a disease, and nothing on this page is advice to treat a medical condition yourself. Read essential oil safety: the essentials first.
Goal-by-goal guide
The first four goals have their own full write-ups, and the strength labels come from sources we read for them. For the others, open the page; we do not give a label on this index without the sources behind it.
| Goal | What the sources we read say | Evidence label | Full guide |
|---|---|---|---|
| Sleep | NCCIH says aromatherapy is sometimes used for insomnia, but little rigorous research has been done, so it is not known whether it helps. [1] Reviews of small trials report better sleep scores, mostly with lavender. [2] | Insufficient (NIH); promising but limited (reviews) | More about Sleep → |
| Anxiety, stress and low mood | For lavender aromatherapy it is unclear whether it helps anxiety, stress or depression symptoms. [3] A large review found lavender trials of low average quality. [4] | Mixed; promising but limited | More about Anxiety, stress and low mood → |
| Headache and migraine | A limited amount of evidence suggests peppermint oil applied to the skin might relieve tension headaches. [5] A review of migraine trials found no significant difference from placebo. [6] | Promising but limited (tension); mixed (migraine) | More about Headache and migraine → |
| Nausea | Inhaled peppermint oil can help reduce nausea and vomiting in people having chemotherapy. [5] A Cochrane review found aromatherapy not effective at reducing nausea severity after surgery. [7] | Promising but limited; insufficient after surgery | More about Nausea → |
| Pain and muscle aches | NCCIH notes aromatherapy is sometimes added to massage for conditions such as knee pain from osteoarthritis. [1] It is unclear whether lavender aromatherapy helps some types of pain. [3] | See the page | More about Pain and muscle aches → |
| Colds, congestion and sinus | Poison Control notes eucalyptus oil is used for soothing effects when inhaled, and that swallowed eucalyptus oil can cause seizures. [8] | See the page | More about Colds, congestion and sinus → |
| Skin, acne and eczema | A small amount of research suggests topical tea tree oil might help acne, but more evidence is needed. [9] | Limited (acne); see the page for eczema | More about Skin, acne and eczema → |
| Hair growth and scalp | Proper evidence not found in the NIH summaries we read (aromatherapy, lavender, peppermint and tea tree), which do not describe hair growth as a studied use. | See the page | More about Hair growth and scalp → |
| Mosquitoes, bugs and lice | For head lice, NCCIH says tea tree oil has only been evaluated in combination with other ingredients. [9] | See the page | More about Mosquitoes, bugs and lice → |
| Focus, memory and energy | Read the page for the trials. | See the page | More about Focus, memory and energy → |
| Dementia and agitation | Read the page for the trials. | See the page | More about Dementia and agitation → |
| Menopause and period symptoms | Read the page for the trials. | See the page | More about Menopause and period symptoms → |
| Asthma, allergies and breathing | Poison Control says any allergic reaction that includes difficulty breathing should be treated as a medical emergency. [8] | Claims and cautions | More about Asthma, allergies and breathing → |
| Weight loss, blood pressure and other claims | Covered as claims checked against sources. | See the page | More about Weight loss, blood pressure and other claims → |
One digestive example shows why the form of a product matters. NCCIH says peppermint oil in enteric-coated capsules may improve irritable bowel syndrome (IBS) symptoms in adults, a result for a specific capsule product studied in trials, not for oil from a bottle. [5] See peppermint oil capsules for IBS.
How to read the table
- Different oils, different evidence. A result for peppermint does not apply to lavender. Lavender here is Lavandula angustifolia and peppermint is Mentha x piperita. [10] [11]
- A product, not a bottle. Some studies used specific capsules, creams, massage or inhalers. NIH notes oral lavender research has small samples and a lack of independent funding and testing. [3] Bottled essential oils are not for swallowing, and misuse can cause serious poisoning. [8]
- Human studies are what count for a claim. Lab results in a dish do not show what an oil does in people. See human studies vs lab research and how much human research exists.
- Traditional use is not proof, and proof is not dismissed because a use is traditional. See traditional use vs clinical evidence.
- Study quality varies. The largest review of lavender for anxiety describes a low average quality of studies and a high overall risk of bias in most trials. [4]
Frequently asked questions
What essential oil is best for sleep?
We do not rank oils. NIH says it is unclear whether lavender aromatherapy improves sleep quality or insomnia, and lavender is simply the oil most studied. [3] [12]
Do essential oils help hair growth?
Proper evidence not found in the NIH summaries we read. Our hair guide covers the trials.
Can essential oils treat anxiety, depression or any other disease?
We found no source showing that. Sources describe small, mixed studies, and NIH says depression can be a serious illness that needs a health care provider. [3]
Is it safe to swallow an essential oil for a health goal?
No. Misuse of essential oils can cause serious poisoning, and NCCIH says tea tree oil should not be swallowed. [8] [9]
Where do these goal guides get their evidence?
From NIH summaries, regulators, poison centers, Cochrane and other systematic reviews, and trials on PubMed that we read. Each page lists its sources.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety across all goals
Poison Control warns that misuse of essential oils can cause serious poisoning, that many oils can cause rashes, that allergy is a very real possibility, and that children have thin skin and immature livers, which might make them more susceptible. [8] If an oil is swallowed, call Poison Help at 1-800-222-1222; for collapse, a seizure or trouble breathing, call 911. NIH also advises talking with a provider before using herbal products if you take any medicine. [5] See medication interactions.
References
- Aromatherapy (NCCIH, last updated January 2020). https://www.nccih.nih.gov/health/aromatherapy. Read 2026-10-23.
- Effect of aromatherapy on sleep quality of adults and elderly people: a systematic literature review and meta-analysis (Complementary Therapies in Medicine, 2021). https://pubmed.ncbi.nlm.nih.gov/34166869/. Read 2026-10-23.
- Lavender: Usefulness and Safety (NCCIH, last updated February 2025). https://www.nccih.nih.gov/health/lavender. Read 2026-10-23.
- Effects of lavender on anxiety: a systematic review and meta-analysis (Phytomedicine, 2019). https://pubmed.ncbi.nlm.nih.gov/31655395/. Read 2026-10-23.
- Peppermint Oil (NCCIH, last updated May 2025). https://www.nccih.nih.gov/health/peppermint-oil. Read 2026-10-23.
- Essential oils as an alternative treatment for migraine headache: a systematic review and meta-analysis (Korean Journal of Family Medicine, 2024). https://pubmed.ncbi.nlm.nih.gov/37899272/. Read 2026-10-23.
- Aromatherapy for treatment of postoperative nausea and vomiting (Cochrane Database of Systematic Reviews, 2018). https://pubmed.ncbi.nlm.nih.gov/29523018/. Read 2026-10-23.
- Essential oils: Poisonous when misused (Poison Control). https://www.poison.org/articles/essential-oils. Read 2026-10-23.
- Tea Tree Oil (NCCIH). https://www.nccih.nih.gov/health/tea-tree-oil. Read 2026-10-23.
- GBIF Backbone Taxonomy name match: Lavandula angustifolia (GBIF). https://api.gbif.org/v1/species/match?name=Lavandula+angustifolia. Read 2026-10-23.
- GBIF Backbone Taxonomy name match: Mentha piperita (GBIF). https://api.gbif.org/v1/species/match?name=Mentha+piperita. Read 2026-10-23.
- A systematic review of the effect of inhaled essential oils on sleep (Journal of Alternative and Complementary Medicine, 2014). https://pubmed.ncbi.nlm.nih.gov/24720812/. Read 2026-10-23.