Originally published January 3, 2018 · Updated by The Homestead Guru Editor on November 8, 2026.
Plants belong in a natural health conversation, including thoughtful questions about essential oils. People facing cancer may seek familiar scents, calming rituals and ways to feel more at home in their bodies. Those wishes deserve a careful, honest discussion of both possibilities and limits.
Separate promising research from a treatment claim
Researchers can test plant compounds on cells in a laboratory or study them in animals. Such work can offer clues for further research. It does not establish that a bottle of essential oil, an oral mixture or a diffuser will safely shrink a tumor in a person.
The National Cancer Institute’s aromatherapy review reports that peer-reviewed studies of aromatherapy as a cancer treatment have not been published. Its patient research focuses on symptoms and quality of life.
Essential oils have not been established as a way to prevent cancer, stop abnormal cell growth or replace cancer treatment. A product’s purity claim, a testimonial or a list of laboratory properties cannot establish those outcomes.
Consider aromatherapy for comfort
Aromatherapy has been studied for concerns such as anxiety, sleep, nausea and pain in people with cancer. Results are mixed: some studies report improvements, while others find no symptom change. That leaves room for an individual preference without promising a reliable medical effect.
If you enjoy a particular scent, ask your care team whether an aromatherapy practice fits your situation. Discuss the exact oil and how you intend to use it. Strong smells may be unpleasant during treatment, so a scent you usually love may not feel comforting now. A quiet, scent-free space is also a valid choice.
Scientific research: a promising symptom study
A 2025 randomized trial published in BMC Complementary Medicine and Therapies studied 92 women with breast cancer. Participants received either Citrus aurantium inhalation aromatherapy or a control oil alongside their usual anti-nausea medicines. The aromatherapy group reported lower combined nausea, vomiting and retching scores on days three through five; there was no significant difference on the first two days.
This is an encouraging result for symptom support. It was a short study at one clinic, and the authors identified important limitations, including the absence of a standardized symptom score before the intervention and uncertainty about the size of change patients would consider meaningful. The trial did not test whether aromatherapy treated the cancer itself. Its findings apply to the studied preparation and setting, not every oil or home protocol.
Anecdotal reports: hear individual experiences
In a 2019 r/cancer discussion, one commenter said peppermint helped their nausea and lavender helped them relax, while explicitly separating that experience from treating their cancer. In an August 2024 r/breastcancer post, a person receiving chemotherapy said an aromatherapy pod from their infusion center helped a little, but nausea persisted.
These are first-person reports from public accounts whose identities, diagnoses and outcomes we have not verified. They offer a view of individual comfort and preferences, including partial benefit. They do not prove a tumor response, tell us how often a practice helps or predict another person’s response. Readers can explore those experiences alongside the research and safety information.
Use concentrated plant products carefully
Poison Control explains that some essential oils can cause poisoning when swallowed or absorbed through the skin. Skin irritation and medication interactions are also possible. Oil entering the lungs during swallowing can cause serious injury.
- Adding essential-oil drops to drinking water does not establish that they are safe to ingest.
- Follow directions for the exact product and intended use. A food flavoring and a concentrated aromatherapy oil are not interchangeable.
- For skin use, choose a product intended for that purpose and follow its dilution directions. Do not apply oils to damaged skin; stop if irritation develops.
- Store oils securely away from children and pets. Obtain specific advice before use around children, during pregnancy or when medicines or health conditions may change the risk.
If an oil is swallowed or causes an unexpected reaction, contact Poison Control for exposure-specific guidance. In the United States, call 1-800-222-1222.
Bring your natural health preferences into the conversation
Write down what you hope a practice will help with: sleep, worry, nausea or something else. Ask what evidence exists for that goal, what risks apply to you and how you will judge whether it helps. Share supplements and remedies with your cancer care team so they can check for interactions and help you make an informed choice.
Our natural health first perspective welcomes plant knowledge and thoughtful research. It also calls for clear language about uncertainty, careful use and the difference between personal comfort and a demonstrated cancer treatment.
Weigh experience, research and your own priorities
Traditional knowledge and personal experience can raise valuable questions, including questions formal research has not answered. A gap in published evidence does not, by itself, prove that an approach has no effect. It also does not establish that it works or is safe.
When you investigate a treatment, consider the whole picture: the person’s experience, the preparation used, the study methods, funding and conflicts of interest, independent replication, known harms and the consequences of delaying other care. Corporate or government involvement is one part of that assessment, not a substitute for examining the evidence itself. We support your freedom to explore and make informed decisions, with uncertainty and risks stated plainly.
