QUICK SUMMARY
Essential oils are concentrated plant compounds that can support wellness through inhalation, topical application, and, when appropriate for the specific oil and product, carefully considered internal use. After more than two decades studying essential oils and writing three books on the subject, I consider clove, eucalyptus, frankincense, lavender, lemon, oregano, peppermint, rosemary, sandalwood, and tea tree among the best essential oils for natural healing.
Research ranges from human clinical trials to animal and laboratory studies, so not every traditional use has the same level of evidence. Lavender has some of the strongest human evidence for relaxation and anxiety support, while many antimicrobial and anticancer findings for other oils remain preclinical. Below, I explain what the research actually shows and how we use essential oils practically and safely.
I truly believe God designed our bodies to thrive when we align with His natural design. One of the most powerful ways I support my family’s wellness is by using essential oils, concentrated plant-based tools that we use to cleanse, calm, and support our bodies and minds.
Over the years, I’ve tested dozens of healing natural oils and blends. I’ve read the research, studied clinical use, and written three books on the topic. Below, I share what I’ve learned about 10 of the best essential oils for natural healing, what the evidence actually shows, and practical ways to use them in your home.
Let’s dig in!
Table of Contents
Natural Healing Oils Through History
Truth be told, the best essential oils as we know them today are relatively new on the long timeline of plant-based therapies. Essential oils are concentrated volatile compounds obtained from aromatic plant material such as flowers, leaves, peels, bark, wood, resins, roots, and seeds.
Ancient cultures certainly used aromatic plants, infused oils, resins, incense, balms, and other botanical preparations. Distillation also has ancient roots, although the sophisticated distillation methods used to produce modern essential oils developed over centuries. This distinction matters because the aromatic remedies described in ancient texts were not always chemically identical to the bottled essential oils we use today.
What is clear is that aromatic plants have a remarkable history. Egyptians, Greeks, Romans, Persians, Indians, Chinese, and other cultures developed sophisticated traditions around fragrant and medicinal plants. Hippocrates is also associated historically with aromatic baths and massage. These traditions helped preserve botanical knowledge long before modern analytical chemistry could identify individual constituents such as linalool, eugenol, menthol, carvacrol, and 1,8-cineole.
As civilizations changed, so did the techniques used to prepare aromatic plants. Persian and Arab scholars made major advances in distillation, and European herbal traditions continued developing through the medieval and Renaissance periods. What our ancestors learned through observation and experience now gives researchers fascinating questions to investigate with modern laboratory and clinical methods.
Essential Oils Meet the Modern Era
What we know as modern “aromatherapy” took shape in the early twentieth century. French chemist René-Maurice Gattefossé was already working with aromatic materials when he was badly burned in a laboratory explosion in 1910. His later experimentation with lavender essential oil helped deepen his interest in its antiseptic and healing properties, and his work became influential in modern aromatherapy (1).
French physician Jean Valnet later helped expand the medical interest in essential oils, while Marguerite Maury became known for individualized aromatherapy and massage applications. Since then, essential oils have become widely used in complementary and integrative health practices around the world.
Modern research gives us something historical use alone cannot: the ability to separate promising mechanisms from demonstrated clinical outcomes. Some essential oils now have human clinical research behind particular uses, while other exciting findings are still limited to laboratory or animal studies. That distinction is important throughout this list.
10 Best Essential Oils for Healing
Essential oils contain complex mixtures of naturally occurring molecules, and different oils can have very different biological activities. Research has explored antimicrobial, anti-inflammatory, antioxidant, calming, respiratory, skin, digestive, and other properties. But an oil showing activity against a microbe in a petri dish is not the same thing as proving that it treats an infection in a person, just as an animal study cannot automatically be translated into a human treatment.
The list is long, but after careful research and years of practical use, I've narrowed it down to 10 of my favorite essential oils for supporting natural healing. Your favorites may be different, but this is a great place to start. You can learn more about how to use these and other fabulous essential oils in my book, The Healing Power of Essential Oils.
1. Clove (Syzygium aromaticum)
Clove essential oil is rich in eugenol and has long been valued for oral care and cleansing applications. Laboratory research supports strong antimicrobial activity. In one study from the University of Buenos Aires, clove essential oil was tested against Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. All three were susceptible under the experimental conditions, with E. coli the most sensitive (2).
That makes clove especially interesting for researchers studying natural antimicrobial agents, but this was laboratory evidence, not a clinical trial showing that clove oil cures bacterial infections in people. Clove is also a potent oil, so more is not better and thoughtful dilution matters.
2. Eucalyptus (Eucalyptus globulus)
Eucalyptus has a long history of traditional use and is one of the most recognizable essential oils for respiratory support. Its major constituents, including 1,8-cineole in many eucalyptus oils, have attracted considerable research interest.
One often-cited study created a eucalyptus-oil nanoemulsion and tested it against Staphylococcus aureus. In that laboratory formulation, the bacteria lost viability within 15 minutes. The same formulation was also evaluated for wound healing in rats (3). Those results are promising, but they involved a specially prepared nanoemulsion, laboratory bacteria, and an animal model, not ordinary bottled eucalyptus oil treating human infection.
We still love eucalyptus for its fresh aroma and practical respiratory applications, while keeping the strength of the claim tied to the strength of the evidence.
3. Frankincense (Boswellia carterii, frereana & sacra)
Overshadowed for generations by its role in the Christmas story, frankincense is finally receiving the scientific attention this Biblical tree deserves. Researchers have investigated frankincense preparations for anti-inflammatory, immune-modulating, and anticancer activity.
One fascinating study found that Boswellia sacra essential oil induced cell death and suppressed aggressive characteristics in cultured human breast-cancer cell lines, including MCF-7 cells (4). Other preclinical work has continued exploring frankincense essential oil in cancer models. These findings are important, but they are preclinical and do not establish frankincense essential oil as a cancer treatment in humans.
Another distinction is important here: research on boswellic acids from frankincense resin extracts should not automatically be attributed to distilled frankincense essential oil. The resin and its extracts are chemically different from the volatile oil.
Frankincense remains one of our favorite oils, and its Biblical history, traditional use, and growing research base make it especially fascinating to follow.
4. Lavender (Lavandula angustifolia)
Well-known for its soothing, calming properties, lavender is one of the best-studied essential oils in human aromatherapy research. Systematic reviews of clinical trials have found that lavender aromatherapy can reduce anxiety in a variety of settings, although study methods and populations vary and researchers continue calling for higher-quality trials (5).
Lavender has also been studied for antioxidant and metabolic effects, but it is essential to distinguish the evidence. A frequently cited 2013 study found that Lavandula stoechas essential oil reduced hyperglycemia and oxidative stress in diabetic rats (6). The oil was injected into animals, so this study does not show that lavender essential oil treats diabetes in people.
This is a perfect example of why I love following essential-oil research without getting ahead of it. Lavender already has useful human evidence for calming applications, while its other biological effects continue to be explored.
5. Lemon (Citrus limon)
Various citrus essential oils are favorites for their bright aromas and household applications. Lemon essential oil, typically expressed from the peel, is rich in limonene and other volatile compounds.
Laboratory studies have found antimicrobial activity from lemon essential oil against certain food-borne microorganisms, although effectiveness depends on the organism, concentration, formulation, and food environment (7). This makes lemon oil interesting for food-safety and preservation research, but it should not be interpreted as proof that consuming lemon essential oil treats food-borne illness.
For everyday use, lemon remains one of our favorite fresh-smelling oils for cleaning blends, aromatic use, and properly formulated applications.
6. Oregano (Origanum vulgare)
Oregano essential oil is rich in compounds such as carvacrol and thymol, depending on the chemotype, and has been extensively investigated for antibacterial and antifungal activity. Much of the strongest antimicrobial evidence is laboratory research, where oregano oil and its constituents can inhibit a range of microorganisms.
That does not make oregano oil a universal substitute for antibiotics or antifungal medications, but it does help explain why this powerful oil has earned so much attention in natural-health research and traditional practice.
Oregano is also one of the oils where route and dose matter tremendously. It can irritate skin and mucous membranes when used too strongly. Internal use should never be treated as casual simply because oregano is a familiar culinary herb. The essential oil is far more concentrated than the herb itself.
7. Peppermint (Mentha piperita)
Peppermint is one of the most versatile essential oils in our home. Its cooling aroma makes it a favorite for inhalation and topical blends, and peppermint preparations have been studied for several digestive and comfort-related applications.
One fascinating 2013 laboratory study examined several essential oils in combination with beta-lactam antibiotics against multidrug-resistant bacteria. Peppermint oil showed synergistic effects with piperacillin and meropenem against some of the bacteria tested, reducing the minimum inhibitory concentrations of those antibiotics (8).
That finding does not mean peppermint oil is “antibiotic resistant,” nor does it mean peppermint can replace antibiotics for bacterial infections. It means researchers observed a resistance-modifying effect in specific laboratory combinations. That is still exciting research, and it is exactly the kind of work I hope continues.
8. Rosemary (Salvia rosmarinus)
Rosemary has been used traditionally for memory, circulation, hair care, and common aches and pains. One especially interesting human study followed 32 people with primary hypotension who used rosemary essential oil over 72 weeks. Researchers reported improvements in blood-pressure measurements along with physical and mental quality-of-life scores (9).
This is human evidence, which makes it noteworthy, but it was a small prospective study rather than a large randomized controlled trial. It does not establish rosemary essential oil as a replacement for blood-pressure medication. If you have abnormal blood pressure or take medication for it, that distinction matters.
Rosemary remains an exciting oil for circulation, cognitive, hair, and wellness research, and this is an area worth watching as better human trials emerge.
9. Sandalwood (Santalum album)
Sandalwood has a long history in traditional wellness practices and is prized for its rich aroma. Laboratory researchers have also investigated sandalwood oil and alpha-santalol for several biological activities.
A 2013 study found that sandalwood essential oil inhibited tyrosinase and cholinesterase enzymes in vitro, leading the researchers to suggest potential for future Alzheimer's and skin-care research (10). But this was an enzyme-based laboratory study, not a human Alzheimer's trial. It demonstrates a mechanism worth investigating, not a proven treatment for neurodegenerative disease.
For us, sandalwood's traditional aromatic uses and emerging laboratory research make it a valuable oil, while the clinical questions remain open.
10. Tea Tree (Melaleuca alternifolia)
Last, but certainly not least, tea tree is one of the best-known essential oils for topical cleansing. It has a long history of use for minor skin concerns, and research supports antimicrobial and anti-inflammatory activity.
Safety claims need precision, though. Reviews indicate that tea tree oil is generally well tolerated when appropriately used topically, but irritation and allergic contact dermatitis can occur, especially with oxidized or concentrated oil. Toxicity has also been reported after substantial oral ingestion (11). At the same time, available genotoxicity data have not shown tea tree oil or its tested constituents to be genotoxic under the conditions reviewed.
That is a much more useful takeaway than calling any essential oil “completely safe.” Tea tree is powerful, useful, and one of our household staples, but potency and safety belong in the same conversation.
These oils are some of my favorite natural tools, but they are not interchangeable. The plant species, chemotype, product quality, route of use, dilution, dose, duration, age, health status, and purpose all matter. That is why we teach essential oils as a system rather than treating every bottle the same.
Uses & Applications of Healing Essential Oils
We teach three primary routes of essential-oil use: inhalation, topical application, and internal use. Not every essential oil is appropriate for every route, and “natural” does not mean that concentration no longer matters. The practical applications below focus primarily on aromatic and topical use.
- Baths: 10 drops mixed with 1/4 cup of olive oil and 1 cup of salt makes fantastic aromatherapy for circulatory, muscular, respiratory, skin, and sleep problems in addition to calming your nerves. Generally, it is advisable to avoid potent oils that could irritate the skin such as cinnamon, oregano, or clove; instead, use soothing oils like lavender and Roman chamomile.
- Compresses: 10 drops in 1 Tbsp of high proof alcohol added to 4 oz. of water. Soak a cloth and apply for bruises, infections, aches, and pains.
- Inhalations: 5 drops in a diffuser or in hot water for sinus or headache relief. Choose your more soothing oils for hot water inhalation usage, like in steam bowls, as hot oils could become quite irritating to the nasal passages used this way!
- Salves: A 2% dilution is recommended, which is 12 drops per 1 ounce of oil, for relaxation and to alleviate joint/muscle soreness.
Internal use requires a separate level of care. Some essential oils and essential-oil constituents have established culinary uses, but that does not mean every oil should be swallowed or that medicinal internal use is appropriate without oil-specific guidance. Product identity, dose, duration, interactions, and the reason for using it all matter.
To learn more about dilutions, check out my article: Aromatherapy Guide for Beginners.
- Gattefossé. “History.” Source.
- Nuñez L, D'Aquino M. “Microbicide activity of clove essential oil (Eugenia caryophyllata).” Brazilian Journal of Microbiology. 2012;43(4):1255-1260. PubMed.
- Sugumar S, Ghosh V, Nirmala MJ, Mukherjee A, Chandrasekaran N. “Ultrasonic emulsification of eucalyptus oil nanoemulsion: antibacterial activity against Staphylococcus aureus and wound healing activity in Wistar rats.” Ultrasonics Sonochemistry. 2014;21(3):1044-1049. PubMed.
- Suailong M, Chen P, Li D, et al. “Boswellia sacra essential oil induces tumor cell-specific apoptosis and suppresses tumor aggressiveness in cultured human breast cancer cells.” BMC Complementary and Alternative Medicine. 2011. PubMed.
- Donelli D, Antonelli M, Bellinazzi C, Gensini GF, Firenzuoli F. “Effects of lavender on anxiety: A systematic review and meta-analysis.” PubMed.
- Sebai H, Selmi S, Rtibi K, et al. “Lavender (Lavandula stoechas L.) essential oils attenuate hyperglycemia and protect against oxidative stress in alloxan-induced diabetic rats.” Lipids in Health and Disease. 2013;12:189. PubMed.
- Ozogul Y, Kuley E, Ucar Y, Ozogul F. “Antimicrobial impacts of essential oils on food borne-pathogens.” Recent Patents on Food, Nutrition & Agriculture. 2015;7(1):53-61. PubMed.
- Yap PSX, Lim SHE, Hu CP, Yiap BC. “Combination of essential oils and antibiotics reduce antibiotic resistance in plasmid-conferred multidrug resistant bacteria.” Phytomedicine. 2013;20(8-9):710-713. PubMed.
- Fernández LF, Palomino OM, Frutos G. “Effectiveness of Rosmarinus officinalis essential oil as antihypotensive agent in primary hypotensive patients and its influence on health-related quality of life.” Journal of Ethnopharmacology. 2014;151(1):509-516. PubMed.
- Misra BB, Dey S. “TLC-bioautographic evaluation of in vitro anti-tyrosinase and anti-cholinesterase potentials of sandalwood oil.” Natural Product Communications. 2013;8(2):253-256. PubMed.
- Hammer KA, Carson CF, Riley TV, Nielsen JB. “A review of the toxicity of Melaleuca alternifolia (tea tree) oil.” Food and Chemical Toxicology. 2006;44(5):616-625. PubMed.
