Essential Oils
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Frankincense

The resin of a wounded tree, four species sold under one English name, and the one oil in the kit with no single direction.

~14 min read

It comes out of a wound in a tree

Almost everything else in your kit was a leaf, a flower, a peel or a seed. Frankincense was an injury. A harvester cut through the bark of a Boswellia tree on a limestone ridge in the Horn of Africa, and the tree did what a tree does when it is opened: it pushed resin over the cut to seal it. That resin hardened in the sun for a fortnight and was scraped off by hand.

Boswellia is a small, stubborn tree of the family Burseraceae, growing where almost nothing else bothers to β€” shallow rock, steep ground, long dry seasons. A tree living like that cannot afford to lose tissue, so it invests heavily in the chemistry that closes a wound fast. That investment is why the species is worth anything to us.

  1. 1.The cut. Shallow, through the bark, just deep enough to open the resin ducts. Deeper is not better β€” a cut into the wood does damage the tree cannot seal.
  2. 2.The weep. A milky white liquid runs and then stops β€” hence the older trade name, olibanum, from the Arabic al-lubān, the milk.
  3. 3.The hardening. Two to three weeks on the trunk, until sun and dry air turn the liquid into a glassy lump β€” a tear.
  4. 4.The scrape, tree by tree, then grading by size, colour and bark content. The cut is reopened several times a season.
  5. 5.The still. Resin broken up and steam distilled.

The later flows are not the same as the first. The opening cut releases resin that had been sitting in the ducts, carrying bark and dust with it; after that the tree is responding rather than leaking, so second and third flows are paler and cleaner. There is a limit: a tree tapped too often produces less viable seed, and hard-harvested groves stop regenerating. So the practices that matter are unglamorous β€” a cap on cuts per tree, rest seasons, and an agreement long enough that resting a tree makes economic sense to the person holding the knife. That is Sourcing in one sentence. There is no such thing as a frankincense plantation.

Resin is a generous raw material β€” roughly five to ten per cent of its weight comes over as oil, against some hundred and fifty pounds of flowering tops for a pound of lavender. It is not quick, though: hard resin is driven for hours, and Distillation covers why run time changes what ends up in the bottle.

Frankincense is also not quite a resin. It is an oleo-gum-resin: a volatile aromatic fraction, a resin fraction of heavy acids, and a water-soluble gum. A still takes one of the three.

Diagram to come

Three panels across one Boswellia trunk. One: the shallow incision with bark peeled back and the resin ducts just beneath β€” show the depth clearly, because depth is the point. Two: milky resin weeping from the cut and running a short way down the bark. Three: the same cut two to three weeks later with hardened amber tears attached, and a hand scraping one free. Small inset beside panel three showing first, second and third flow tears side by side, increasing in size and paleness.

Four trees, one English word

Frankincense is not a species. It is a trade name for the resin of several trees in the genus Boswellia, and the oils they give are not interchangeable β€” they differ in constituent profile, in aroma, and in what is present at all. The oil record names four for doTERRA’s Frankincense: Boswellia carterii, sacra, papyrifera and frereana.

Drawing on several species is deliberate. Each has its own harvest calendar, terrain and communities, and a supply resting on one escarpment in one country is fragile.

The five species, and how their oils differ
SpeciesWhere it growsWhat sets its oil apart
Boswellia carteriiSomaliland and SomaliaCommonest in the trade. Monoterpene-led, alpha-pinene its signature. Many taxonomists treat it as the same species as sacra.
Boswellia sacraDhofar in Oman, into YemenThe frankincense of the classical incense route. Chemically very close to carterii.
Boswellia frereanaCoastal SomalilandSold as maydi. No boswellic acids at all β€” the cleanest proof that these are different materials.
Boswellia papyriferaEthiopia, Eritrea, SudanThe outlier: led by an ester, octyl acetate, rather than monoterpenes.
Boswellia serrataIndiaRarely distilled. The species behind almost every boswellia supplement extract.

The one thing to check on any frankincense bottle

Turn it over and look for a botanical name. A frankincense that names no species has told you nothing β€” and at the price frankincense commands, that silence is where adulteration lives. It is commonly stretched with cheaper conifer oils that share its alpha-pinene. A bottle naming its species and lot can be checked against a batch report; Purity and quality is how.

Photograph to come

Frankincense tears from different species laid side by side on a sorting cloth, unlabelled in the photo so the caption can carry the names β€” the near-white large maydi tears next to smaller amber carterii tears next to darker papyrifera. Shot flat and close, daylight, no styling. The point is that the differences are visible to the naked eye.

What the steam actually carries

Open the oil record and Frankincense gives its constituents by name β€” boswellic acids, alpha-pinene, limonene, sesquiterpenes β€” where Lavender carries hard ranges: 25–45% linalyl acetate, 20–47% linalool. Names where the others have numbers, and you can now see why: one range across four species would be a fiction. The record is on Frankincense in the oils library.

Monoterpenes β€” alpha-pinene, limonene

Two isoprene units, ten carbons. Small, light, fat-soluble, quick to evaporate β€” the sharp, almost green note in the first seconds. Alpha-pinene also dominates fir, juniper and pine, which is why a frankincense diffusion reads as forest. Terpenes is how these are built.

Sesquiterpenes

Three isoprene units, fifteen carbons β€” half again as heavy and far less willing to evaporate. These are what is still on your wrist four hours later, and why an oil this rich in monoterpenes still sits in the base-note category.

Boswellic acids

Triterpene acids, thirty carbons, with an acidic group hanging off them. The famous ones β€” and mostly not in your bottle.

A note describes how long a smell lasts, not how much of it there is. The monoterpenes flash off in the first half hour; the heavy fraction stays for hours, and that lingering half is what your nose files the oil under. Smell one drop on the back of your hand, then again an hour later. Two different oils.

Diagram to come

A cutaway still with the split drawn explicitly. Left: broken resin in the pot, labelled with its three fractions. Centre: steam rising and carrying the light molecules β€” draw monoterpenes small and numerous, sesquiterpenes larger and fewer, so the size difference is the visual argument. Right: condenser and collected oil. At the bottom of the pot, a labelled residue of boswellic acids and gum with a blocked arrow showing they do not rise. Molecule sizes roughly proportional: 10, 15 and 30 carbons.

Boswellic acids, and why an oil is not an extract

Boswellic acids are large triterpene acids found in Boswellia resin β€” beta-boswellic acid, acetyl-11-keto-beta-boswellic acid and their relatives. They are what nearly all published frankincense research is about. Read an article on what frankincense does at a cellular level and the odds are overwhelming that what was tested was a boswellic acid preparation.

They are also largely absent from the distilled oil, for a mechanical reason. A still separates by volatility: steam carries whatever is light enough and loosely enough held to travel with it. A monoterpene at ten carbons travels easily. A sesquiterpene at fifteen travels less easily but travels. A boswellic acid is thirty carbons with a carboxylic acid group that hydrogen-bonds to its neighbours and holds it down. It goes nowhere, and stays in the pot with the spent resin. Boswellia frereana carries none at all, and has been traded as premium frankincense for centuries.

So the oil and a resin extract are two different materials from the same tree, and research on one does not transfer to the other. You will still see boswellic acids listed among the primary constituents, here and nearly everywhere else β€” that reflects what the material is known for, not what steam carries into a bottle.

None of this is a reason to think less of the oil. It is a reason to be precise: when someone sends you a study, ask which material was tested and from which species. If you want the boswellic acids themselves, they arrive as a botanical extract β€” boswellia is in the nutrient library, in DDR Prime and Deep Blue Polyphenol Complex.

One caution about thinking in single constituents at all. Researchers at Roseman University tested doTERRA oils, then could not reproduce what they had seen using the purified constituents at the same concentrations. The Oil Effect is that finding in full.

Why it reaches so many places

Every oil in your kit has a direction it pushes: peppermint cools, oregano purifies, lavender settles. Frankincense has no single direction, and that β€” rather than any special potency β€” is why it turns up in more places than any of them.

  1. 1.Three routes β€” aromatic, topical, and internal where your label allows it.
  2. 2.No dominant voice. Menthol is 30–50% of peppermint, so peppermint is chemically an argument for one thing. Frankincense is led by no single strongly-characterised constituent β€” a weakness when you want a specific effect, a strength when you want one that fits anywhere.
  3. 3.Small, fat-soluble molecules that cross lipid membranes readily β€” many places gently rather than one place forcefully.

[Integumentary](/healer/learn/wellness/integumentary) β€” skin

The most common daily use. Helps maintain the appearance of healthy, smooth skin β€” a standard addition to an evening face oil.*

[Nervous](/healer/learn/wellness/nervous) β€” brain and nerves

Inhaled, it promotes feelings of relaxation and grounded attention β€” which is why it became the incense of contemplative practice.*

[Immune](/healer/learn/wellness/immune)

Supports healthy immune function when taken internally, if your label says it is for internal use.*

[Musculoskeletal](/healer/learn/wellness/musculoskeletal) β€” muscles and joints

Diluted and massaged into the back and shoulders after effort, often layered with copaiba.*

[Respiratory](/healer/learn/wellness/respiratory) β€” nose, airways, lungs

The resinous inhalation every incense tradition arrived at independently. Supports the feeling of easy, open breathing.*

[Metabolic](/healer/learn/wellness/metabolic) β€” cells and mitochondria

Supports healthy cellular function β€” why frankincense appears in daily cellular-support routines.*

Now the honest part. Nearly all the published work on frankincense and cells is laboratory research: cells in a dish, at a concentration chosen by the experimenter, which is not the same as what happens in a person. A dish has no skin to cross, no liver, no bloodstream. Laboratory work is how a question gets asked, not the answer.

Why wide distribution is a mechanism and not a hand-wave

A monoterpene is a ten-carbon hydrocarbon with no charge and little affinity for water, and cell membranes are made of fat. Such a molecule crosses one without needing a transporter or a receptor β€” the property that gets these constituents through skin at all, and the same property that stops them piling up in any one tissue. They spread, and they clear. The route then decides the destination as much as the molecule does: aromatic through the nose to the olfactory nerve, topical into the tissue beneath the skin, internal through the gut wall and then the liver. So "what does frankincense do" is an incomplete question. The complete one is: which constituent, by which route, into which tissue, at what dose.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Aromatic, topical, internal

How to use oils covers the three routes generally. This is frankincense specifically.

Aromatic

Three to four drops in a diffuser, or one drop into the palms, cupped over the nose, three slow breaths. Frankincense is quiet β€” it will not carry a room the way peppermint will, which is one reason it is usually diffused alongside something.

Topical

One to two drops to the area, diluted in a carrier oil. Frankincense is among the gentlest oils in the kit and its safety level does not require dilution. Dilute anyway, for the reason below.

Internal

Only if the label on your bottle says it is for internal use β€” labelling differs by country and the bottle in your hand is the authority. Where it does: one drop in about 120 millilitres of liquid, in glass or stainless steel rather than plastic.

"It is gentle, so you need not dilute" is the wrong conclusion. A drop of neat oil covers about a fingertip of skin and is largely gone within minutes; the same drop in half a teaspoon of carrier covers a forearm and stays in contact far longer. Dilution here is about coverage and contact time rather than danger.

Dilution, counted in drops

One millilitre is about twenty drops, so a 15 mL bottle holds roughly 250 and every ratio below is countable on a teaspoon.

WhereStrengthPer teaspoon of carrierIn a 10 mL roller
Face and neck, daily0.5–1%1 drop1–2 drops
Body, general use2%2 drops4 drops
One specific area, short term3%3 drops6 drops
Children over two, with care0.25–0.5%1 drop per two to four teaspoons1 drop

Fractionated coconut oil is the default carrier: liquid at any room temperature, almost no smell of its own. Jojoba suits the face. Make the roller rather than diluting drop by drop each time, and write down what went into it.

Frankincense is usually the second oil, not the first

It is used with something rather than instead of it, for chemical reasons. As a base note it slows the evaporation of the lighter oil it joins, making a short-lived blend last β€” and it has no aggressive character of its own, so it can join almost anything without taking it over.

Only consume oils whose label states they are for internal use. Labelling differs by country, and the bottle in your hand is the authority.

What this looks like in an ordinary week

Four situations account for almost everything a household does with the bottle β€” each a different dilution, a different time of day, and a different expectation of how long it takes to notice anything.

What are you reaching for it for?

A daily drop in water belongs alongside those four, if your label says it is for internal use: one drop in about 120 millilitres, in glass or stainless steel. Pick one and do it for a month before adding a second. Write it down in Protocols.

Five thousand years of the same smell

For most of recorded history frankincense was the most valuable thing a plant produced β€” traded by weight against precious metals, taxed by the cities on the road it travelled. Petra was built on that tax. Egypt burned it in temple ritual; it was one of the four spices of the Hebrew temple incense; it burns still in Orthodox censers and in the bakhoor of the Gulf. The name is the Old French franc encens, noble incense. Our own record puts the emotional profile briefly: truth and enlightenment, and the courage to stand as yourself. Traditional framing rather than clinical β€” but this scent has spent fifty centuries in rooms where people were being still, and smell reaches emotion and memory faster than any other sense. Both are real, both work on the same nervous system, and neither has to be dressed up as the other.

What it goes with, and why

Five regular partners, each working for a reason you can read off the profiles.

Lavender

25–45% linalyl acetate and 20–47% linalool β€” esters and monoterpene alcohols. Soft where frankincense is sharp, so the blend stays mild enough for nightly use. Lavender has its own lesson.

Wild Orange

80–97% limonene. Frankincense already contains limonene, so this amplifies a note already in the bottle β€” and the heavy fraction anchors a top note that would otherwise be gone within half an hour.

Cedarwood

10–47% cedrol, sesquiterpene throughout. Base note on base note β€” the longest-lasting of these pairings on skin.

Copaiba

45–65% beta-caryophyllene. The only pairing here with a named receptor mechanism behind it β€” beta-caryophyllene binds CB2 directly, the subject of the endocannabinoid system. The after-effort blend.

Bergamot

20–55% limonene, 10–45% linalyl acetate, 3–20% linalool. The bridge: limonene shared with frankincense, linalyl acetate shared with lavender, so the three hang together rather than separating into three smells.

Two of those carry a caution. Wild Orange and Bergamot are cold pressed from peel, and expressed citrus oils are photosensitising: keep skin you applied them to out of direct sunlight and UV for up to twelve hours. Frankincense is not β€” but a blend is as photosensitising as its most photosensitising member.

Frankincense also sits inside blends you may already own β€” one of the four oils in Balance, and in DDR Prime. The range on sale differs by country. Building your own: choose the oil with the job first, then add frankincense at a third to a half of the drops.

Cautions, storage and the honest limits

Frankincense is one of the least troublesome oils in the kit, which is not the same as no rules. Safety is the full treatment.

  • Keep out of reach of children. If you are pregnant, nursing or under a doctor’s care, consult your physician before use.
  • Avoid eyes, inner ears and other sensitive areas. If oil reaches an eye, flush it with carrier oil rather than water β€” water spreads it instead of removing it.
  • Dilute for children at the lower end of any range β€” thinner skin and a smaller body change the arithmetic, not just the caution.
  • Frankincense is not photosensitising. Blends containing expressed citrus oils are, for up to twelve hours after application.
  • Store it capped, dark and cool. Monoterpene-rich oils oxidise on contact with air, light and warmth, and oxidised monoterpenes sensitise skin more readily than fresh.
  • If a frankincense has turned sharp and turpentine-like, it has oxidised. Still fine in a diffuser; keep it off faces.
  • Buy where the chain traces back to a lot number. An adulterated frankincense is not a weaker one β€” it is a different liquid wearing the label.

What you are doing here is different from professional medical care and does not replace it. If something is severe, sudden, persistent, or you simply do not know what it is, that is a conversation with a practitioner β€” a well-stocked shelf is not a reason to delay it.

Keep oils away from eyes and inner ears, and out of reach of children. If you are pregnant, nursing, under medical care or taking medication, speak to your healthcare practitioner before use. Nothing here is intended to diagnose, treat, cure or prevent any disease.

Where to go from here

Where this comes from

  • The Healer at Home Booklet β€” the Frankincense and Family Essentials Kit chapters.
  • The doTERRA Live Guide β€” the directions for use and the cautions reproduced here.
  • The doTERRA Essential Oil Chemistry Handbook β€” the monoterpene and sesquiterpene chapters.
  • The Frankincense record in this app’s oils library β€” the authority for its botanical names, constituents and safety text.
  • Published chemical analyses of the genus Boswellia β€” the constituent differences between carterii, sacra, frereana and papyrifera.

Lesson 13 of 21 Β· Essential Oils