The Resin That Built (and Burned Down) Empires
Frankincense was worth more than gold in the ancient world. Literally. The Nabataeans built Petra -- an entire city carved into sandstone cliffs -- on the profits from trading it. Rome burned 3,000 tons of the stuff at Emperor Nero's wife's funeral. The Three Wise Men brought it as a gift to an infant alongside gold and myrrh, and nobody at the time thought that was a weird flex.
Fast-forward a few millennia, and frankincense oil has become the darling of the premium essential oil market. MLM reps on Instagram claim it cures cancer. Ayurvedic practitioners use it for joint inflammation. Church incense makes people feel reverent. And somewhere in the middle of all this, researchers are publishing peer-reviewed papers trying to figure out what the compound actually does.
The answer? More than skeptics expect. Less than the true believers promise.
What You're Actually Working With
Frankincense essential oil comes from the resin of Boswellia trees -- primarily Boswellia sacra, B. carterii, B. serrata, and B. frereana. The resin is steam-distilled to produce the essential oil, which is chemically distinct from the resin extract itself.
This distinction matters enormously and is the source of most frankincense confusion.
Frankincense essential oil contains primarily monoterpenes and sesquiterpenes -- alpha-pinene, limonene, myrcene, and others. These are volatile aromatic compounds.
Boswellia resin extract (the supplement form) contains boswellic acids -- pentacyclic triterpenes, particularly acetyl-11-keto-beta-boswellic acid (AKBA). These are the compounds responsible for most of the anti-inflammatory research.
Here's the problem: boswellic acids are not present in meaningful concentrations in steam-distilled essential oil. They're too heavy to volatilize during distillation. When you read a study about boswellic acids reducing inflammation, that study used resin extract, not the essential oil sitting on your shelf.
Every time someone cites boswellic acid research to sell frankincense essential oil, they're either confused or being deliberately misleading. The oil and the extract are different products with different active compounds.
What the Essential Oil Can Do
Anxiety and Emotional Regulation
Inhaled frankincense oil does appear to have psychoactive effects. A 2008 study published in The FASEB Journal found that incensole acetate -- a compound present in frankincense resin and, in smaller amounts, in the essential oil -- activates TRPV3 channels in the brain, producing anti-anxiety and antidepressant effects in mouse models (Moussaieff et al., 2008).
Incensole acetate is present in frankincense essential oil at low levels (1-5% depending on species and distillation), so inhalation may deliver some of this compound. The calming, "spiritual" feeling people report when burning frankincense incense or diffusing the oil has a plausible neurochemical basis.
Respiratory Support (Inhalation)
Alpha-pinene, the dominant compound in many frankincense oils, has demonstrated bronchodilatory effects. Inhaling frankincense may open airways slightly and reduce the perception of respiratory restriction. Traditional use in Ayurveda and Traditional Chinese Medicine for asthma and bronchitis aligns with this mechanism.
However, no major clinical trials have examined frankincense essential oil specifically for respiratory conditions. The evidence here is mechanistic (we know what the compounds do) rather than clinical (we've tested it in patients).
Topical Skin Benefits
Frankincense oil contains compounds with mild anti-inflammatory and antimicrobial properties. Diluted topical application may help with:
- Minor skin irritation and redness
- Dry or aging skin (anecdotally -- the anti-aging claims lack rigorous evidence)
- Small blemishes and uneven skin tone
The anti-aging claims are everywhere, but the data is thin. Frankincense is not a replacement for retinoids, sunscreen, or evidence-based dermatological care.
What the Essential Oil Can't Do (Despite What You've Heard)
Cure or Treat Cancer
Let's address this directly, because it's the most dangerous claim in the frankincense world.
Several in vitro studies have shown that boswellic acids (from the resin extract, not the essential oil) and certain essential oil compounds can inhibit cancer cell growth in laboratory dishes. A 2011 study in BMC Complementary and Alternative Medicine found that frankincense oil induced cytotoxicity in bladder cancer cell lines.
But killing cells in a petri dish is easy. Bleach does it too. The question is whether you can achieve therapeutic concentrations in a living human body without toxicity. No clinical trial has demonstrated that frankincense essential oil treats, prevents, or cures any cancer in humans.
Anyone claiming otherwise is putting lives at risk. People delay proven treatments because they've been told frankincense oil will handle it. This has real consequences.
Replace Anti-Inflammatory Medications
The anti-inflammatory claims for frankincense essential oil borrow evidence from boswellic acid supplement research (particularly B. serrata extract for osteoarthritis). As established above, the essential oil does not contain meaningful amounts of boswellic acids. If you want the anti-inflammatory benefits, you need a Boswellia extract supplement, not the essential oil.
A 2014 systematic review in BMC Complementary and Alternative Medicine (Yu et al., 2020) found that oral Boswellia serrata extract showed promise for osteoarthritis pain relief. The key word there is "oral extract." Rubbing frankincense oil on your knee is not the same intervention.
How to Use Frankincense Oil Wisely
For Mood and Calm
Diffusion: 3-4 drops in an ultrasonic diffuser. Frankincense has a warm, resinous base note that blends well with citrus oils (orange, bergamot) and other tree resins (myrrh, cedarwood). A classic calming blend: 2 drops frankincense + 2 drops lavender + 1 drop orange.
Meditation support: Place 1 drop on a tissue or your palms, cup hands over nose, and breathe slowly for 2-3 minutes before meditation or prayer. There's a reason this resin has been used in spiritual practice for millennia -- the aroma genuinely promotes a contemplative state.
For Skin
Anti-aging serum (manage expectations): Mix 6-8 drops frankincense with 1 oz rosehip seed oil or argan oil. Apply to face nightly after cleansing. This is a pleasant skincare ritual, and the carrier oils themselves have evidence for skin benefits. Just don't expect to undo 20 years of sun damage.
Spot treatment: Dilute 2-3 drops in 1 teaspoon carrier oil and apply to minor blemishes or skin irritations.
For Respiratory Support
Steam inhalation: 2-3 drops in a bowl of hot water, towel over head, breathe for 5-10 minutes. The alpha-pinene content may provide mild bronchodilatory relief.
Sourcing and Sustainability: An Uncomfortable Truth
Frankincense trees are in trouble. A 2019 study in Nature Sustainability projected that Boswellia populations could decline by 50% within 20 years due to overtapping, fire, and insufficient regeneration. The trees take 8-10 years to mature enough for resin tapping, and increased demand from the essential oil industry is accelerating harvest rates beyond sustainable levels.
If you use frankincense oil, consider:
- Buying from companies that can document sustainable sourcing
- Using frankincense sparingly rather than diffusing it daily
- Choosing B. serrata (more abundant) over B. sacra (more threatened) when possible
- Recognizing that your wellness practice has ecological consequences
When to Talk to a Pro
- If you're considering using frankincense as part of cancer treatment (please don't substitute it for medical care -- use it alongside, and only with your oncologist's knowledge)
- Joint pain or inflammation that limits daily activities (get diagnosed properly before self-treating)
- Persistent respiratory issues (frankincense may mask symptoms of conditions needing diagnosis)
- Skin conditions that don't improve or worsen with topical frankincense
- Before using during pregnancy (limited safety data)
FAQ
Does frankincense essential oil contain boswellic acids? In negligible amounts, if any. Boswellic acids are triterpenic compounds too heavy to volatilize during steam distillation. The anti-inflammatory research on boswellic acids (AKBA, etc.) applies to resin extracts and standardized supplements, not essential oil. If you want boswellic acids, buy a Boswellia extract supplement.
Can I take frankincense oil internally? Some essential oil companies market frankincense as safe for internal use. However, there's no clinical evidence that ingesting the essential oil provides therapeutic benefits, and it can irritate the GI tract. The oral frankincense research uses standardized Boswellia extract, a different preparation entirely.
Is frankincense essential oil worth the price? At $25-60 per 15ml bottle, frankincense is one of the pricier essential oils. For mood support and meditation, it's genuinely lovely and arguably worth it if you value the experience. For skin and health claims, you're paying a premium for an oil whose most-cited benefits actually belong to a different product (resin extract). Know what you're buying and why.
What's the difference between frankincense and myrrh? Both are tree resins, but from different genera (Boswellia vs. Commiphora). Frankincense is brighter and more uplifting; myrrh is darker, earthier, and more astringent. In skincare, myrrh has slightly more evidence for wound healing, while frankincense is more commonly used for general skin tone. They blend beautifully together and have been paired in traditional use for thousands of years.
Does the species of Boswellia matter? B. sacra/carterii (Omani/Somali frankincense) is the most common essential oil species and has the most aromatic complexity. B. serrata (Indian frankincense) is the species most studied for boswellic acid supplements. B. frereana (Maydi frankincense) has a unique citrusy profile and is prized in perfumery. For diffusion and mood, species is a preference matter. For supplements, B. serrata has the strongest evidence base.
A note from Living & Health: We're a lifestyle and wellness magazine, not a doctor's office. The information here is for general education and entertainment — not medical advice. Always talk to a qualified healthcare professional before making changes to your health routine, especially if you have existing conditions or take medications.
Sources
Moussaieff, A., et al. (2008). Incensole acetate, an incense component, elicits psychoactivity by activating TRPV3 channels in the brain. The FASEB Journal, 22(8), 3024-3034. https://pubmed.ncbi.nlm.nih.gov/18492727/
Yu, G., et al. (2020). Effectiveness of Boswellia and Boswellia extract for osteoarthritis patients: a systematic review and meta-analysis. BMC Complementary Medicine and Therapies, 20, 225. https://pubmed.ncbi.nlm.nih.gov/32680575/
