Indian frankincense is the resin harvested from the Boswellia serrata tree, a species native to the Indian subcontinent. It has been used for thousands of years in Ayurvedic medicine, where it’s known as Shallaki, primarily to treat joint pain and inflammatory conditions. Today it’s one of the most widely studied herbal supplements for osteoarthritis, and it’s available in standardized extract form in most health stores.
The Tree and Its Resin
Boswellia serrata is a deciduous tree that grows in the seasonally dry tropical regions of India, including parts of Assam and the western Himalayas. When the bark is cut or naturally cracks, the tree exudes a sticky, aromatic gum resin that hardens on contact with air. This dried resin is what’s sold as Indian frankincense. It’s closely related to the frankincense used in incense and perfumery (Boswellia sacra and other species from the Arabian Peninsula and East Africa), but Boswellia serrata is the species with the strongest research base for medicinal use.
How It Reduces Inflammation
The resin contains a group of active compounds called boswellic acids. The most potent of these blocks an enzyme called 5-lipoxygenase, which your body uses to produce leukotrienes, a type of inflammatory molecule. By interrupting that pathway, boswellic acids reduce inflammation at one of its chemical sources rather than just masking pain. This mechanism is distinct from how common anti-inflammatory drugs work, which is part of why researchers have been interested in it as a complementary option.
Clinical studies have also shown that Boswellia supplementation lowers measurable markers of inflammation in the blood, including TNF-alpha, C-reactive protein, and interleukin-6. These aren’t numbers you’d track at home, but they confirm that the anti-inflammatory effect isn’t just subjective.
Evidence for Joint Pain and Osteoarthritis
The strongest clinical evidence for Indian frankincense involves knee osteoarthritis. In a double-blind, placebo-controlled trial published in Frontiers in Pharmacology, 105 participants with newly diagnosed knee osteoarthritis received either a standardized Boswellia extract or placebo twice daily for 90 days. The results were notable: participants taking 300 mg of the extract saw their pain scores drop by nearly 62%, while overall joint function improved by about 74%. Even the lower 150 mg dose produced a 45% reduction in pain and a 69% improvement in overall joint symptoms.
Improvements in pain appeared as early as five days after starting supplementation, though the full benefits built over the three-month trial. Participants also walked significantly farther in timed walking tests, with roughly a 21% improvement in the distance covered in six minutes. These findings align with earlier trials that observed meaningful reductions in stiffness and physical limitations alongside pain relief.
Other Conditions It’s Used For
Beyond joint health, clinical trials have shown promising results for several other inflammatory conditions. These include ulcerative colitis, Crohn’s disease, rheumatoid arthritis, and bronchial asthma. The common thread is chronic inflammation: Boswellia’s mechanism of action targets the same inflammatory pathway regardless of where the inflammation occurs. The evidence for these conditions is less extensive than for osteoarthritis, with fewer large-scale trials, but the direction of the findings has been consistently positive.
In Ayurvedic tradition, Shallaki was used broadly for swelling, pain, and respiratory complaints. Classical texts describe it as bitter and astringent, with properties that counteract both the inflammation and stiffness associated with joint disease. Modern research has essentially validated these traditional applications, though the science frames the mechanism differently.
Supplements and Standardization
Not all Boswellia products are created equal. Raw resin powder contains a variable mix of compounds, while standardized extracts guarantee a specific concentration of the active boswellic acids. The most studied commercial extracts are standardized to contain 30% of the key compound (AKBA) along with 50% to 55% total boswellic acids. Some formulations use 20% AKBA with added Boswellia oil to improve how the body absorbs the active ingredients.
Dosing in clinical trials has typically ranged from 150 mg to 1,000 mg daily. Doses up to 1,000 mg per day have been safely used in studies lasting up to six months, and short-term use at 2,400 mg daily for up to a month has also appeared safe. Most supplement labels recommend splitting the dose into two servings per day, which mirrors the protocols used in research.
Absorption and How to Take It
One of the practical challenges with Indian frankincense is that boswellic acids are fat-soluble and poorly absorbed on their own. Taking a supplement on an empty stomach means much of it passes through without reaching your bloodstream. Research suggests taking it with a meal that contains fat to significantly improve absorption. Some studies recommend dosing every six hours with fatty meals to maintain steady levels in the blood.
Manufacturers have tried to solve this problem in several ways. Some pair the extract with soy lecithin, a fat-based carrier, which has been shown to increase the concentration of boswellic acids reaching the blood and tissues. Others use nano-emulsion technology or combine the extract with the tree’s own non-volatile oil. If you’re choosing a supplement, formulations designed for enhanced absorption will generally deliver more benefit per milligram than a basic powdered extract.
Safety and Interactions
Indian frankincense is generally well tolerated. Clinical trials lasting up to six months have not reported serious adverse effects at standard doses. Minor gastrointestinal discomfort is the most commonly noted side effect.
The most relevant drug interaction to be aware of involves leukotriene inhibitors, a class of medications prescribed for asthma. Because Boswellia works on the same inflammatory pathway these drugs target, taking both could amplify the effect in unpredictable ways. If you take asthma medication that controls leukotrienes, it’s worth discussing Boswellia with your prescriber before adding it.