Lavender can mean several plants, and beyond anxiety capsules the evidence is thin

Key takeaways

• In 2023, two U.S. hospital trials of lavender after joint replacement disagreed: a trial funded by a patch maker reported less opioid use, while a trial of a lavender inhaler found no overall difference⁸⁹.
• A 2020 Cochrane review of 13 small trials, most using lavender, found no convincing evidence that aromatherapy helps people with dementia⁶.
• Lavandin, a high-yield hybrid of true lavender and spike lavender, tends to carry more camphor, so look for the Latin name Lavandula angustifolia if you want true lavender³.
• Lavender oil exposed to air forms compounds that can trigger skin allergy, and 2.8% of patients in one patch-test study reacted to oxidized lavender oil¹¹.
• Europe’s medicines agency accepts lavender oil only as a traditional remedy for mild stress and sleep, and it doesn’t recommend it in pregnancy, breastfeeding or for children under 12².

In 2023, two American hospitals published tests of the same simple idea. Give people lavender to smell after joint replacement surgery, and see whether they need fewer opioid painkillers.

At UPMC Shadyside Hospital in Pittsburgh, hip-replacement patients with high anxiety wore a small adhesive patch on their gowns from before surgery through the second day after. In the final analysis, 34 had a patch scented with lavender and peppermint, and 31 had a placebo patch with almond oil⁸. The scented group used 33% less opioid medicine on day two and reported 26% less pain a week after surgery, the authors wrote⁸.

The patch maker, Beekley Medical, paid for the study through a grant⁸. The paper’s summary and main text didn’t always agree, even on how many patients were analyzed, and the authors said more research was needed to confirm the results⁸.

At Beaumont Health, a research team publishing in Orthopedic Nursing gave 102 hip- and knee-replacement patients either usual care plus a lavender oil inhaler or usual care alone⁹. Total opioid use came out about the same in both groups⁹. Still, 58% of inhaler users found it useful for pain, and 76% said they would keep using it after going home⁹.

Same plant, two answers. That pattern runs through most of lavender’s research beyond the calming capsules. Our earlier article covered lavender for sleep and the basics of essential oil safety. This profile covers the rest: which lavender you’re buying, what the trials show for other uses, and how to use it well.

Three lavenders share the name, and their chemistry differs

True lavender is Lavandula angustifolia. NCCIH, the federal center for complementary health, lists English lavender, common lavender and even French lavender as names for it¹. Common names wander. The Latin name doesn’t.

Lavandin, Lavandula × intermedia, is a sterile cross between true lavender and spike lavender, Lavandula latifolia³. It grows bigger and hardier. Researchers at New Mexico State University cite oil yields of about 7% to 9% for lavandin versus 2% to 5% for true lavender³.

Lavandin oil is also higher in camphor, a sharp-smelling compound the lavender trade generally counts against oil quality³. In the New Mexico plots, the lavandin variety ‘Grosso’ carried the most. The lab found no camphor at all in two English lavender varieties³.

Oil without a camphor note sells for more, the researchers noted³. Camphor oil itself is a poisoning risk for children, as our sleep-scent article explains.

The main aroma compounds in lavender oil are linalool and linalyl acetate¹¹. Lavender comes as essential oil for diffusers, massage and baths; as oral capsules of lavender oil; and as tea, syrup, skin products and dried culinary buds¹²³.

Europe’s official monograph covers only one plant: oil steam-distilled from the flowering tops of L. angustifolia². A product labeled just “lavender” could be any of these.

Europe recognizes lavender as a traditional remedy, not a proven one

Lavender’s name comes from the Latin lavare, “to wash,” and its scent still fills bath products and perfumes¹. The plant is native to the Mediterranean, including France, Spain and Italy¹.

The European Medicines Agency (EMA) gives that history a formal place. Since 2012, it has recognized lavender oil as a traditional herbal medicine for easing mild stress and exhaustion and for helping sleep². The traditional doses are 20 to 80 milligrams a day by mouth, or 1 to 3 grams added to a warm bath of 10 to 20 minutes, for adults and teens over 12².

“Traditional” is the key word. The EMA judged the anxiety and insomnia studies it reviewed too small to prove an effect, so long use is the basis². The agency called for new data for a periodic review in 2020, and its page lists no revised monograph since².

That approach respects what many natural-health readers value. It honors generations of experience while staying honest that experience isn’t the same as a controlled test. You can hold both ideas at once.

Anxiety: the capsule evidence grew, and so did the funding questions

Our sleep-scent article covered the main trials of Silexan, a lavender oil capsule from the German company Dr. Willmar Schwabe. It found real anxiety benefits in trials largely funded by the maker.

A newer pooled analysis, published in 2023, adds detail. Researchers combined patient data from five double-blind trials in which 1,213 adults took 80 milligrams of Silexan or a placebo daily for 10 weeks⁴. Anxiety scores improved 2.9 points more on lavender than on placebo, and 52% of people on lavender responded, compared with 39% on placebo⁴. The authors describe side effects as mostly mild, passing stomach complaints such as nausea and burping, and about as many people quit over side effects on placebo as on lavender⁴.

The fine print matters. The maker started all five trials, which were run in Germany, and it paid for the analysis. A company employee did the statistics⁴.

How much does 2.9 points matter? No one has worked out from data the smallest change on this anxiety scale that patients would notice⁴. The trials’ planners had assumed 2.5 to 3.5 points would be meaningful, and the result landed in that range⁴. NCCIH points to small samples and a lack of independently funded or tested studies¹.

In pregnancy. In January 2026, Ruta Nonacs, MD, PhD, of the Massachusetts General Hospital Center for Women’s Mental Health summarized the evidence⁵. She described a 2024 review of six studies, five of them randomized trials, in 413 pregnant women. Lavender inhaled or applied to the skin in the second and third trimesters was linked to less anxiety and stress and better sleep⁵.

But none of those studies was blinded, so women knew what they were getting⁵. Nonacs concluded that lavender’s safety and effectiveness in pregnancy and breastfeeding remain unclear, and that larger, better-blinded trials are needed⁵. Silexan’s maker doesn’t recommend it during pregnancy or breastfeeding⁵. If you’re pregnant or nursing, check with your clinician before using any lavender product.

Our rating: Promising but early, consistent with our sleep-scent and anxiety guides. Lavender isn’t a substitute for proven anxiety care such as therapy.

Pain after surgery and period cramps: small trials, mixed answers

The two hospital trials show why surgical results are hard to read. The positive trial mixed lavender with peppermint and was paid for by the patch maker⁸. The other trial had no placebo inhaler and found no overall drop in opioid use⁹. NCCIH calls the effect of lavender aromatherapy on some types of pain unclear¹.

Menstrual cramps. A 2019 review in the International Journal of Pediatrics found five small trials of lavender for painful periods, all from Iran¹⁰. In the four that tested lavender without peppermint, pain eased by a large margin compared with control groups¹⁰.

Look closer, though. The trials delivered lavender in different ways: inhaled, in a massage oil, mixed with other oils, or blended into olive oil¹⁰. One compared lavender-peppermint massage with massage alone¹⁰.

Results varied widely from trial to trial, and several studies were rated low quality because they were small, lacked random assignment or reported blinding poorly¹⁰. The authors themselves urged caution¹⁰. If a lavender massage oil eases your cramps and your skin tolerates it, enjoy it, but see a clinician if period pain disrupts your life.

Dementia and hair loss: one big review says no, one small trial says maybe

Agitation in dementia. Lavender is the oil most often tested to calm restless people with dementia. A 2020 Cochrane review, which gathers the randomized trials on a question, turned up 13 of them with 708 people⁶. Every trial that named its setting took place in a care home or similar institution, and eight used lavender⁶.

Agitation was the main test. Of the five trials whose agitation results the reviewers rated most trustworthy, four showed no significant effect⁶. A broader checklist of behavior and mood symptoms told a different story: four of five comparable trials reported a benefit⁶. Quality of life, mood, sleep and memory showed no gain⁶.

Most trials barely tracked side effects, if at all, which leaves safety an open question⁶. Weighing it all, the reviewers found nothing convincing to show aromatherapy helps people with dementia, while stressing that the data had too many gaps to settle the matter⁶.

Patchy hair loss. Alopecia areata is a condition in which the immune system attacks hair follicles, leaving bald patches. In 1998, dermatologists in Aberdeen, Scotland, ran a double-blind trial with 86 patients⁷.

The treatment group massaged a blend of thyme, rosemary, lavender and cedarwood oils, mixed into jojoba and grapeseed oil, into the scalp every day for seven months. The control group used the carrier oils alone⁷. The bald patches improved in 44% of the essential-oil group and 15% of the control group, judged by two dermatologists from photos⁷.

That’s a striking result from a well-designed study. But lavender was one of four oils, so the trial can’t say which one helped⁷. And one trial, however well run, is a thin base for a firm conclusion.

What the evidence shows

Use	Form and dose studied	Evidence level
Anxiety	Silexan capsules, 80 mg a day for 10 weeks; maker-run trials4	Promising but early14
Anxiety in pregnancy	Inhaled or skin-applied lavender in later pregnancy; unblinded studies5	Promising but early; studies unblinded5
Pain and opioid use after joint replacement	Lavender-peppermint patch; lavender inhaler89	Promising but early; mixed results89
Menstrual cramps	Inhaled oil, 2% massage oil, oil blends10	Promising but early; small Iranian trials10
Patchy hair loss (alopecia areata)	Four-oil scalp massage, daily for 7 months7	Promising but early; one trial7
Agitation in dementia	Mostly lavender aromatherapy in care homes6	Not enough evidence; no convincing benefit, weak trials6
Low mood	Oral capsules or tea; skin use showed no effect1	Not enough evidence1

Safety beyond what our sleep-scent article covered

Lavender in food amounts is likely safe, NCCIH says¹. Oral products may be safe for short-term use, with possible burping, nausea, diarrhea and headache. Aromatherapy may cause headache or coughing¹.

Old oil and skin allergy. Lavender on the skin can cause allergic reactions¹. Exposure to air makes it worse. The main compounds, linalool and linalyl acetate, react with oxygen in the air to form hydroperoxides, which can trigger skin allergy¹¹.

In one patch-test study, 2.8% of patients with suspected contact dermatitis reacted to oxidized lavender oil, one of the highest rates among the essential oils studied¹¹. Standard fragrance tests missed some of those allergies¹¹. Because air drives the change, keep bottles tightly capped, and don’t put old, opened oil on your skin.

Sedatives, driving and surgery. NCCIH flags a theoretical interaction with sedative drugs and herbs, especially around surgery¹. The EMA warns that lavender oil may impair driving². Tell your surgeon about any supplement you take¹².

Pregnancy, breastfeeding and children. NCCIH says little is known about safety in pregnancy or breastfeeding¹. The EMA doesn’t recommend its lavender oil products then, or for children under 12². Our sleep-scent article covers rare reports of breast growth in children who used lavender products.

Other medicines and the liver. The EMA found no reported drug interactions², and we found no liver warning in the NCCIH or EMA documents. NCCIH still advises checking with a provider if you take any medicine¹.

When to get help

• Call poison help at 1-800-222-1222 if anyone swallows essential oil. Call 911 for collapse, a seizure, trouble breathing or someone who can’t be woken¹³.
• Stop using it at the first rash, headache or cough¹.
• See a clinician if anxiety, pain or sleep problems persist. If low mood brings thoughts of suicide, call or text 988¹⁴.
• Report a bad reaction to the FDA at 800-FDA-1088 or online¹².

Culinary lavender and growing your own

Cooks use lavender buds in baked goods, drinks and herb blends, and NCCIH considers food amounts likely safe¹. Variety matters for taste.

The New Mexico team notes that cooks usually favor ‘Provence,’ a lavandin, because it is low in camphor³. Their own lab results complicate that. ‘Provence’ still had some camphor, while the English lavenders ‘Hidcote’ and ‘Compacta’ showed none, so the researchers think those two could work in the kitchen just as well³.

Growing your own lets you know exactly what you have. Lavender thrives in poor, sandy, alkaline soil, shrugs off heat and drought, and does best where the air is dry³. English lavender and lavandin are among the hardiest types for colder regions³. Pick the stalks once the lowest few blossoms start to open, when bud quality peaks³.

Product	What it is	Best use	Don’t
Culinary buds	Dried flowers, ideally a low-camphor variety3	Baking, tea, syrups	Use high-camphor lavandin if you dislike a medicinal bite3
Lavender tea	Dried flowers steeped in water1	A calming ritual	Expect it to match capsule trials
Essential oil	Steam-distilled, highly concentrated2	Diffuser, bath, diluted massage oil	Swallow it, or use old, oxidized oil on skin1113
Oral capsules	Measured lavender oil, 80 mg in trials4	Anxiety, with a clinician’s input	Combine with sedatives, or use in pregnancy12
Lavandin oil or soap	Hybrid oil, often more camphor3	Fragrance, soap3	Assume it equals true lavender

Your lavender profile card

Plants	True lavender (Lavandula angustifolia); lavandin (L. × intermedia); spike lavender (L. latifolia)23
Part used	Flowers and flowering tops; oil is steam-distilled2
Key compounds	Linalool and linalyl acetate; camphor varies by type311
Best-supported use	Anxiety, as a specific oral oil capsule (promising but early, maker-funded)14
Traditional use	Mild stress and exhaustion, sleep, baths2
Skip or ask first	Pregnancy, breastfeeding, children under 12, sedatives, upcoming surgery, fragrance allergy or a past lavender rash1211

Buying checklist

• Look for Lavandula angustifolia on the label if you want true lavender²³.
• For oils, look for the plant part and the extraction method, such as steam-distilled flowering tops².
• Check for a bottling or expiration date, and buy small bottles you’ll use up before the oil ages¹¹.
• For capsules, note the milligrams of lavender oil per dose and compare it with the 80 milligrams used in trials⁴.
• For cooking, buy buds sold as food, or grow a low-camphor variety yourself¹³.
• Store every oil capped and out of reach of children and pets, as our sleep-scent article explains.

Questions readers ask

The bottom line

Lavender is several plants, and the label’s Latin name tells you which one you’re getting. Beyond the company-tested anxiety capsules, its records for surgery pain, menstrual cramps and hair loss come from small, mixed trials, and a Cochrane review found no convincing benefit in dementia.

Enjoy it in the kitchen, the garden and the bath, where tradition and safety records are strongest. Treat the essential oil as a potent product, keep it fresh and capped, and talk with a clinician before using oral lavender if you’re pregnant, take sedatives or face surgery.

Related reading

• Lavender is the best-studied sleep scent, though its trials can’t hide the smell
• Anxiety responds to therapy, medicine and exercise, and some calming herbs carry real risks
• Chamomile eases worry a little, and its skin and colic claims rest on less
• Who paid for the study matters, even when the science is real
• Home gardens save money until you count your hours, but a trial found other payoffs

Sources

1. National Center for Complementary and Integrative Health. “Lavender.” NIH, last updated February 2025. nccih.nih.gov
2. European Medicines Agency, Committee on Herbal Medicinal Products. “Community Herbal Monograph on Lavandula angustifolia Miller, aetheroleum” (EMA/HMPC/143181/2010), adopted March 27, 2012; product page ema.europa.eu (monograph text read via e-lactancia.org)
3. Martin CA, Rodriguez J, O’Connell M, Steiner R, Yao S. “Lavender Cultivar Trial Results for North-Central New Mexico, 2003 Through 2005.” Research Report 770, New Mexico State University Agricultural Experiment Station, revised May 2012. pubs.nmsu.edu
4. Dold M, Bartova L, Volz HP, et al. “Efficacy of Silexan in Patients with Anxiety Disorders: A Meta-Analysis of Randomized, Placebo-Controlled Trials.” European Archives of Psychiatry and Clinical Neuroscience, 2023;273(7):1615-1628. pmc.ncbi.nlm.nih.gov
5. Nonacs R. “For the Treatment of Perinatal Anxiety: What About Lavender Oil?” MGH Center for Women’s Mental Health, January 6, 2026. womensmentalhealth.org
6. Ball EL, Owen-Booth B, Gray A, Shenkin SD, Hewitt J, McCleery J. “Aromatherapy for Dementia.” Cochrane Database of Systematic Reviews, 2020, Issue 8, CD003150. cochrane.org
7. Hay IC, Jamieson M, Ormerod AD. “Randomized Trial of Aromatherapy: Successful Treatment for Alopecia Areata.” Archives of Dermatology, 1998;134(11):1349-1352 (University of Aberdeen record). abdn.elsevierpure.com
8. Chelly JE, Klatt B, O’Malley M, et al. “The Role of Inhalation Aromatherapy, Lavender and Peppermint in the Management of Perioperative Pain and Opioid Consumption Following Primary Unilateral Total Hip Arthroplasty: A Prospective, Randomized and Placebo-Controlled Study.” Journal of Pain & Relief, 2023;12(Suppl 1). pmc.ncbi.nlm.nih.gov
9. Hawkins K, Coffey M, Cooper M, et al. “The Use of Lavender Aromatherapy for Pain After Total Hip and Total Knee Arthroplasty: A Randomized Trial.” Orthopedic Nursing, 2023;42(4):230-242 (Corewell Health record). scholarlyworks.corewellhealth.org
10. Mousavi Kani K, Mirzania Z, Mirhaghjoo F, et al. “The Effect of Aromatherapy (with Lavender) on Dysmenorrhea: A Systematic Review and Meta-Analysis.” International Journal of Pediatrics, 2019;7(7):9657-9666. jpp.mums.ac.ir
11. Hagvall L, Bråred Christensson J. “Patch Testing with Main Sensitizers Does Not Detect All Cases of Contact Allergy to Oxidized Lavender Oil.” Acta Dermato-Venereologica, 2016;96(5):679-683. medicaljournalssweden.se
12. NIH Office of Dietary Supplements. “Dietary Supplements: What You Need to Know.” NIH, updated January 4, 2023. ods.od.nih.gov
13. America’s Poison Centers. “Poison Help.” Accessed October 2026. poisonhelp.org
14. 988 Suicide & Crisis Lifeline. “988 Suicide & Crisis Lifeline.” Accessed October 2026. 988lifeline.org