Can You Eat Frankincense? Safety, Methods, and Risks

Frankincense resin has been eaten, chewed, and dissolved in water for thousands of years across the Middle East, India, and Africa, and doing so is generally considered safe for most people. The resin comes from Boswellia trees and contains compounds called boswellic acids that have genuine anti-inflammatory properties, which is why it keeps showing up in supplement aisles and wellness circles. But “generally safe” comes with real caveats, from poor absorption to drug interactions that could catch you off guard.

A Long History of Chewing and Drinking Frankincense

Frankincense has been used medicinally since at least 2800 BCE across China, India, Africa, and the Middle East. In Ayurvedic medicine, it is valued for effects on the nervous system, and in India it has traditionally been used for arthritis, inflammatory lung diseases, and gastrointestinal disorders. People in some regions still chew raw resin to quench thirst or ease stomach pain.¹ In parts of the Middle East and Arab-African countries, a water extract of the resin has been used to treat liver problems, a practice that animal studies have since partially validated by showing the extract can reduce markers of liver damage in rats.²

So eating frankincense is not some modern biohacking novelty. The practice predates written pharmacology. What has changed is that researchers now understand which compounds in the resin are doing the work, how much of them your body actually absorbs, and where the real risks lie.

What Is in the Resin and Why People Think It Helps

The active compounds in frankincense are boswellic acids, a family of molecules with anti-inflammatory effects. The most studied and potent of them is AKBA (acetyl-keto-beta-boswellic acid).³ These compounds work by tamping down inflammatory signaling in cells. In lab studies using human intestinal cells, Boswellia serrata extract significantly decreased the expression of pro-inflammatory proteins and improved the ability of damaged tissue to heal.⁴

In a clinical trial of 48 people with knee osteoarthritis, participants who took a Boswellia serrata extract for 120 days experienced reduced pain and stiffness and improved physical function compared to placebo. Their knee joint gaps improved on X-ray, osteophyte formation decreased, and blood levels of an inflammatory marker dropped. No serious side effects were reported.⁵ Animal studies have also found that Boswellia can protect the liver and kidneys from damage caused by inflammation, reducing injury in a dose-dependent way.⁶

These results are promising, but they are still preliminary. The osteoarthritis trial was small, and most evidence for specific health benefits comes from cell studies and animal experiments. The gap between “reduces inflammation in a petri dish” and “reliably treats a disease in humans” is large, and frankincense has not yet crossed it for most conditions.

How People Actually Eat It

If you decide to try frankincense, you have a few options, and they differ quite a bit in how much of the active compounds your body will absorb.

Chewing raw resin: The most traditional method. You pop a small piece of the dried oleo-gum-resin (it looks like a yellowish, waxy pebble) into your mouth and chew it like gum. The taste is bitter, piney, and slightly citrusy. Some people find it pleasant; others find it harsh. Chewing releases small amounts of boswellic acids, but absorption through saliva and the digestive tract is limited.
Frankincense water: Soak resin pieces in water overnight. The water turns slightly milky as the water-soluble gum fraction dissolves. This is the method traditional healers in the Middle East use, and it is the form tested in the rat studies showing liver-protective effects.² The water-soluble fraction contains some but not all of the resin’s active compounds. The boswellic acids themselves dissolve poorly in water, so you are mainly getting the gum and some lighter aromatic compounds.
Standardized extract capsules: Most clinical trials use concentrated Boswellia serrata extracts standardized to a set percentage of boswellic acids. These are the products you will find in supplement stores, typically in capsule or tablet form. Dosing is more predictable than with raw resin.
Lecithin-formulated supplements: Newer formulations pair boswellic acids with lecithin (a type of fat) to improve absorption. One such formulation showed plasma levels of key boswellic acids up to seven times higher than the same dose of unformulated extract, with especially dramatic increases in tissue concentrations, including a roughly 35-fold increase in brain levels.⁷

The method you choose matters because of frankincense’s central practical problem: your body does not absorb boswellic acids very well on its own.

The Absorption Problem

AKBA, the most potent anti-inflammatory compound in frankincense, dissolves poorly in water, which limits how much your gut can take up.⁸ This is one of the biggest reasons the gap between lab results and real-world effects is so wide. In a cell culture, researchers can bathe cells in high concentrations of boswellic acids. In your body, much of what you swallow passes through without being absorbed.

One straightforward workaround: take frankincense with a fatty meal. A study in healthy volunteers found that taking a Boswellia extract alongside a high-fat meal led to several-fold increases in blood levels of the key boswellic acids compared to taking the same dose on an empty stomach. Some boswellic acids were undetectable in the blood when taken fasted but appeared clearly after a fatty meal.⁹ If you are going to eat frankincense in any form, taking it with food that contains some fat is the simplest way to get more of the active compounds into your bloodstream.

Advanced formulations take this further. The lecithin-based delivery systems mentioned earlier dramatically boost absorption, and researchers have also developed nanoparticle formulations that achieved roughly six times higher peak blood levels of AKBA in rats compared to plain AKBA.⁸ These technologies are still largely in research stages, but lecithin-based products are already available commercially.

What the Toxicology Studies Show

The safety data on frankincense is reassuring, at least in animal models. In one comprehensive toxicological assessment of a standardized Boswellia serrata extract, rats showed no mortality or signs of toxicity at a single oral dose of 2,000 mg per kilogram of body weight. A 28-day repeated dosing study also found no dose-related toxicity in body weight, organ weight, or blood chemistry. The estimated safe level with no observed adverse effects was 1,000 mg per kilogram per day in both male and female rats.¹⁰ A separate study using a methanol extract from Boswellia dalzielii bark found no deaths and no significant changes in liver or kidney biomarkers at doses up to 3,000 mg per kilogram.¹¹

To put those numbers in context, even the lower safe threshold of 1,000 mg per kilogram, scaled very roughly from a rat to a human, would represent a dose far beyond what anyone takes as a supplement. Typical human supplement doses range from about 300 to 1,200 mg of extract per day, well within the range where animal studies show no problems. The clinical trial for osteoarthritis mentioned earlier reported no serious adverse events over four months of use.⁵

Still, animal toxicology studies are not a perfect mirror of human safety. They test a specific extract under controlled conditions, and they cannot capture every human response, especially in people with existing health conditions or those taking medications.

Drug Interactions Are the Biggest Practical Risk

This is where eating frankincense gets genuinely concerning. Extracts from multiple Boswellia species have been identified as potent inhibitors of several major drug-metabolizing enzymes in the liver, including CYP1A2, CYP2C8, CYP2C9, CYP2C19, CYP2D6, and CYP3A4. The inhibition was non-selective, meaning frankincense hits many of these enzymes at once, and it was equally potent across Boswellia carteri, Boswellia frereana, Boswellia sacra, and Boswellia serrata.¹²

Why does that matter? These enzymes are responsible for breaking down a huge proportion of prescription medications in your body. If frankincense slows those enzymes down, drugs that rely on them for clearance could build up to higher-than-expected levels in your blood, potentially causing side effects or toxicity. The list of medications processed by these enzymes is enormous and includes common blood thinners, antidepressants, anti-seizure drugs, statins, certain blood pressure medications, and many others. Interestingly, the researchers found that while boswellic acids themselves do inhibit these enzymes, they are not the main source of the inhibition, meaning other unidentified compounds in the resin also contribute.¹²

If you take prescription medications, especially ones with narrow dosing windows where a small increase in blood levels could be dangerous, talk to your doctor before adding frankincense to your routine in any form. This applies whether you are chewing resin, drinking frankincense water, or taking capsules.

Allergic Reactions and Skin Sensitivity

Though less common than drug interactions, allergic reactions to frankincense do occur. Allergic contact dermatitis has been reported from frankincense oil derived from Boswellia carterii.¹³ While this particular report involves skin contact rather than ingestion, it signals that some people have immune sensitivity to compounds in the resin. If you have known allergies to tree resins, balsams, or related aromatic substances, start cautiously. Common gastrointestinal side effects reported anecdotally with oral use include nausea, acid reflux, and diarrhea, though these tend to be mild and dose-related.

Contamination and Product Quality

One risk that gets little attention is contamination. Raw frankincense resin is harvested from trees in East Africa, the Arabian Peninsula, and parts of India, often in remote areas with little quality oversight. An analysis of medicinal plant gums found that some resin products contained detectable levels of toxic metals including cadmium, lead, nickel, and others, though frankincense was not the worst offender in that particular study (myrrh gum had the highest contamination levels).¹⁴

The broader issue is that frankincense products are not tightly regulated in most markets. In the United States, Boswellia extracts are sold as dietary supplements, which means manufacturers do not need to prove efficacy or safety before selling them. Third-party testing for heavy metals, pesticide residues, and accurate boswellic acid content is available from some brands but not required. If you plan to ingest frankincense regularly, choosing a product that has been independently tested adds a layer of reassurance that the raw resin in a bazaar simply cannot offer.

Frankincense Essential Oil Is Not the Same Thing

A common point of confusion: frankincense essential oil is not the same product as the resin or resin extract. Essential oil is produced by steam distillation, which strips out almost all of the boswellic acids (they are too heavy to vaporize). What you are left with is mostly lighter aromatic terpenes. So frankincense essential oil does not deliver the anti-inflammatory compounds that make the resin interesting.

Some wellness sources recommend ingesting frankincense essential oil, but this carries its own set of risks. A toxicity study in zebrafish found that frankincense essential oil had a safe threshold of about 100 micrograms per milliliter, below which no cardiac, neurological, liver, or genetic toxicity was observed.¹⁵ That is reassuring at low doses, but concentrated essential oils are potent. Swallowing undiluted essential oil can irritate or damage the mucous membranes of your mouth, esophagus, and stomach. If you want the anti-inflammatory benefits of frankincense, the resin extract is the appropriate form. If you want the aroma, the essential oil works fine in a diffuser or diluted on the skin, but ingesting it is harder to justify.

Who Should Be Most Cautious

Frankincense is generally well tolerated in healthy adults at typical supplement doses, but certain groups should exercise extra care:

People on prescription medications: The enzyme-inhibition issue described earlier applies broadly. Blood thinners like warfarin are a particular concern because even modest changes in metabolism can push levels into a dangerous range.
Pregnant or breastfeeding women: There is no reliable human safety data for frankincense during pregnancy. Some traditional systems historically cautioned against it during pregnancy because Boswellia extracts may influence uterine activity, though the evidence is limited. In the absence of clear data, avoidance is the cautious path.
People with liver or kidney disease: While some animal evidence suggests Boswellia may actually protect the liver, someone with compromised liver function could be more susceptible to any toxicity and more affected by the enzyme-inhibition issue, since their drug metabolism is already altered.
Children: Most studies and traditional use patterns involve adults. Appropriate doses for children have not been established.

Choosing Between Raw Resin and Supplements

If you are drawn to frankincense for the experience or for mild traditional use, chewing a small amount of food-grade resin or making frankincense water is about as low-risk as herbal practices get, assuming you are not on medications that could interact. The dose of boswellic acids you absorb from raw resin is modest, and people have been doing it for millennia.

If you want a more consistent dose with better absorption, a standardized extract taken with a meal that includes some fat will deliver more of the active compounds to your bloodstream.⁹ Lecithin-formulated versions go further still.⁷ But more absorption also means more potential for drug interactions and side effects, so the trade-off is not all upside.

Regardless of the form, the honest picture is this: frankincense has real anti-inflammatory activity backed by real science, but the human clinical evidence remains thin and most of it involves small trials or animal data. It is a reasonable thing to try for mild joint discomfort or general wellness, not a replacement for proven treatments for serious inflammatory conditions. And if you take other medications, the conversation with your doctor is not optional.

1
Chinese Herbal Medicines. Frankincense from Boswellia: A review of species, traditional uses, phytochemistry, pharmacology and toxicology
2
African Journal of Traditional, Complementary and Alternative Medicines. HEPATOPROTECTIVE EFFECT AND GC-MS ANALYSIS OF TRADITIONALLY USED BOSWELLIA SACRA OLEO GUM RESIN (FRANKINCENSE) EXTRACT IN RATS
3
PubMed Central. Frankincense (rǔ xiāng; boswellia species): from the selection of traditional applications to the novel phytotherapy for the prevention and treatment of serious diseases
4
PubMed Central. Inhibition of intestinal inflammation and fibrosis by Scutellaria Baicalensis georgi and Boswellia serrata in human epithelial cells and fibroblasts
5
Wiley Online Library. A pilot, randomized, double‐blind, placebo‐controlled trial to assess the safety and efficacy of a novel Boswellia serrata extract in the management of osteoarthritis of the knee
6
Life Sciences. Repression of inflammatory pathways with Boswellia for alleviation of liver injury after renal ischemia reperfusion
7
Fitoterapia. Enhanced absorption of boswellic acids by a lecithin delivery form (Phytosome®) of Boswellia extract
8
PubMed. Development and optimisation of 3-Acetyl-11-keto-β-boswellic acid loaded poly-lactic-co-glycolic acid-nanoparticles with enhanced oral bioavailability and in-vivo anti-inflammatory activity in rats
9
PubMed. Effect of food intake on the bioavailability of boswellic acids from a herbal preparation in healthy volunteers
10
PubMed. Toxicological Assessment of a Standardized Boswellia serrata Gum Resin Extract
11
Asian Journal of Biochemistry, Genetics and Molecular Biology. Acute and Sub-chronic Toxicity Studies on Methanol Stem Bark Extract of Frankincense Tree (Boswellia dalzielii) and Leaves Extract of Kenaf (Hibiscus cannabinus)
12
PubMed. Analysis of frankincense from various Boswellia species with inhibitory activity on human drug metabolising cytochrome P450 enzymes using liquid chromatography mass spectrometry after automated on-line extraction
13
PubMed. Allergic contact dermatitis from Boswellia carterii (frankincense) oil
14
Brazilian Journal of Biology. Contamination levels of toxic metals in selected traditional plants incense (gum)
15
Archives of Clinical Toxicology. Acute, genetic, and target organ toxicity profiling of Frankincense essential oil from Boswellia sacra in zebrafish (Danio rerio)