Frankincense (Boswellia) – Effects and Uses

What is Frankincense?

Frankincense (botanical name: Boswellia, also known as Olibanum) is a resin obtained from various tree species of the genus Boswellia, most notably Boswellia serrata (Indian frankincense) and Boswellia sacra (Arabian frankincense). The resin is produced by making incisions in the tree bark and has been used for thousands of years in religious, cultural, and medicinal contexts. In modern phytotherapy and dietary supplementation, frankincense is valued primarily for its anti-inflammatory effects.

Mechanism of Action

The medicinal effects of frankincense are mainly attributed to its boswellic acids, particularly acetyl-11-keto-beta-boswellic acid (AKBA). These compounds selectively inhibit the enzyme 5-lipoxygenase (5-LOX), which plays a key role in the production of leukotrienes -- pro-inflammatory mediators involved in the initiation and maintenance of chronic inflammation.

• Inhibition of 5-lipoxygenase, reducing leukotriene production
• Suppression of the NF-kB signaling pathway (a central regulator of inflammation)
• Antioxidant activity through neutralization of free radicals
• Potential inhibition of angiogenesis (new blood vessel formation) in tumor conditions

Traditional Use

Frankincense has a millennia-long history as a healing and ritual substance. In Ayurvedic medicine, Boswellia serrata was traditionally used for joint diseases, respiratory complaints, and digestive problems. In Arabic and African folk medicine, the resin was applied to wounds, skin conditions, and used as a pain reliever. In religious contexts, frankincense smoke was used in many cultures for air purification and spiritual practice.

Medical Applications

Joint Diseases

The best-researched application of frankincense is in the treatment of osteoarthritis and rheumatoid arthritis. Clinical studies indicate that Boswellia extracts can reduce pain, improve joint mobility, and alleviate inflammatory swelling. A standardized Boswellia serrata extract with an enriched AKBA content (e.g., trade names 5-Loxin, Aflapin) has shown particularly positive results in studies on knee osteoarthritis.

Chronic Inflammatory Bowel Diseases

Boswellia extracts have been investigated in clinical studies for Crohn's disease and ulcerative colitis. The anti-inflammatory properties of boswellic acids may help reduce intestinal inflammation. The European Medicines Agency (EMA) has recognized Boswellia serrata dry extract as a traditional herbal medicine for the symptomatic relief of mild knee pain.

Respiratory Conditions

Due to its inhibitory effects on leukotrienes, frankincense is also discussed in the context of bronchial asthma, as leukotrienes are involved in triggering bronchospasms. Some small clinical studies reported improvements in lung function and a reduction in asthma attacks with Boswellia supplementation.

Neurological and Oncological Research

In cancer research, frankincense is being studied for its potentially pro-apoptotic (cell-death-inducing) and antiproliferative properties, particularly in brain tumors. However, this research is largely limited to laboratory studies and small clinical pilot trials. A definitive recommendation as a cancer therapy cannot currently be made.

Recommended Dosage

The recommended daily dose of Boswellia extracts varies depending on the extract and indication. Typical dosages used in clinical studies were 300--500 mg of standardized extract (containing at least 30--65% boswellic acids), taken 2--3 times daily. For optimal results, frankincense should be taken with a fatty meal, as boswellic acids are fat-soluble and bioavailability is significantly increased with dietary fat. For accurate dosage guidance, a physician or pharmacist should always be consulted.

Safety and Side Effects

Boswellia extracts are generally considered well tolerated when used as directed. Occasional side effects may include:

• Gastrointestinal issues such as nausea, heartburn, or stomach pain (especially on an empty stomach)
• Diarrhea or loose stools
• Rarely: allergic skin reactions

Important safety considerations:

• Pregnancy and breastfeeding: Use is not recommended, as boswellic acids may potentially stimulate the uterus.
• Drug interactions: Frankincense may interact with anticoagulants (blood thinners) and certain cancer medications (chemotherapy agents). Medical consultation is necessary.
• In the presence of liver disease, frankincense should only be taken after consulting a physician.

Scientific Evidence

Scientific research on frankincense is promising but not yet conclusive. The strongest evidence exists for its use in knee osteoarthritis and joint pain. Further research is needed to better understand the optimal dosage, long-term safety, and efficacy for other conditions (e.g., cancer, inflammatory bowel disease). The European Medicines Agency (EMA) classifies Boswellia serrata as a traditional herbal medicinal product.

References

1. European Medicines Agency (EMA): Assessment Report on Boswellia serrata Roxb. ex Colebr., gummi-resina. EMA/HMPC/513518/2008. London, 2008.
2. Siddiqui MZ: Boswellia serrata, a potential antiinflammatory agent: an overview. Indian J Pharm Sci. 2011;73(3):255-261.
3. Abdel-Tawab M, Werz O, Schubert-Zsilavecz M: Boswellia serrata: an overall assessment of in vitro, preclinical, pharmacokinetic and clinical data. Clin Pharmacokinet. 2011;50(6):349-369.