Anisha Riggs
Incense burning is a common practice in many cultures, with various forms of incense available, including sticks, cones, and coils. While incense has been associated with certain benefits, such as reduced anxiety, the smoke produced during burning contains particulate matter, gas products, and organic compounds that can contribute to indoor air pollution. This has raised concerns about the potential health effects of inhaling incense smoke, particularly in enclosed spaces. As a result, people have turned to air purifiers and filters to mitigate the impact of incense smoke on indoor air quality and prevent potential damage to their surroundings.
| Characteristics | Values |
|---|---|
| Incense smoke composition | Particulate matter (PM), gas products, organic compounds, unburnt carbon fractions, complex residues |
| Particulate matter (PM) composition | Coarse particles (>10 μm), thoracic coarse particles (10-2.5 μm), fine particles (<2.5 μm), ultrafine particles (0.1 μm) |
| Gas products | CO, CO2, NO2, SO2 |
| Organic compounds | Benzene, toluene, xylenes, aldehydes, polycyclic aromatic hydrocarbons (PAHs) |
| Health effects | Respiratory issues, aggravated asthma, respiratory allergies, breathing difficulties, neurological impairment, skin irritation, cardiovascular complications, lung cancer, nasopharyngeal carcinoma, cough symptoms, voice and throat issues |
| Environmental effects | Indoor air pollution, thirdhand smoke, furniture and upholstery residue |
| Air filter effectiveness | Portable HEPA filters reduce PM2.5 concentrations by 52%-67% but may be expensive; Japanese incense may be cleaner and less likely to trigger optical sensors |
| Alternative options | Diffuse Frankincense carteri CO2 extract, use electrostatic precipitators, nanofiber filter media, or high relative humidity for PM2.5 removal |
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What You'll Learn
Incense smoke contains particulate matter, gases and organic compounds
Incense burning is a common practice in many cultures and religions, with a history spanning over 2,500 years. The practice has been associated with various benefits, such as reduced anxiety and medicinal value. However, it is important to understand the components of incense smoke and its potential impact on health and the environment.
Incense smoke contains particulate matter, which includes fine and ultrafine particles resulting from incompletely combusted carbon fractions. These particles are smaller than those found in cigarette smoke, making them more easily inhaled and contributing to oxidative stress. The smoke also contains volatile organic compounds (VOCs), such as benzene, toluene, xylenes, aldehydes, and polycyclic aromatic hydrocarbons (PAHs). These compounds are released during the thermal degradation of lignin and have been associated with respiratory dysfunction and other health issues.
The gas products emitted from burning incense include carbon monoxide (CO), carbon dioxide (CO2), nitrogen dioxide (NO2), and sulfur dioxide (SO2). These gases contribute to the overall toxicity of incense smoke and can have harmful effects on human health. Additionally, the incense materials themselves play a significant role in shaping the emission profiles, with resins, essential oils, aromatic molecules, and synthetic fragrances all impacting the chemical composition of the smoke.
While the benefits of incense burning are recognised, it is important to be aware of the potential risks associated with the practice. The particulate matter, gases, and organic compounds released during incense burning can have detrimental effects on indoor air quality and human health, particularly in enclosed spaces with limited ventilation. Therefore, it is recommended to burn incense in well-ventilated areas and to consider using alternative methods, such as diffusers, to obtain the benefits of incense without the risks associated with smoke inhalation.
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Incense smoke is a major indoor pollutant and health risk
Incense smoke is a significant source of indoor air pollution, releasing harmful pollutants into the air, including particulate matter (PM), carbon monoxide (CO), carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen dioxide (NO2), volatile organic compounds, aldehydes, and polycyclic aromatic hydrocarbons (PAHs). The amount of PM generated by incense burning can be up to 4.5 times higher than that produced by cigarettes. These pollutants have been linked to various health risks, including respiratory issues, cardiovascular problems, and potential carcinogenic effects.
Several studies have examined the health impacts of incense smoke. One study analysed respiratory symptoms in 280 Romanian schoolchildren and found correlations between indoor incense burning and allergies, asthma, and flu-like symptoms. Another study in Hong Kong investigated the impact of temple incense burning and found that NO2 and PM2.5 were the primary pollutants, contributing to respiratory mortality. The proximity of temples to roadsides and residential areas, as well as building and greenery density, were also significant factors.
The smoke generated from burning incense contains unburnt carbon fractions and complex residues that can coalesce and become larger particles when exposed to air. These particles can be inhaled, leading to random toxicity and primarily affecting respiratory health. Additionally, incense burning has been associated with cognitive and brain health issues, including accelerated cognitive ageing, intellectual decline, and an increased risk of Alzheimer's disease and vascular dementia. However, further research is needed to fully understand the mechanisms underlying these relationships.
While incense burning has potential health risks, some people believe it offers medicinal and psychoactive benefits, such as reduced anxiety and antidepressant effects. Nonetheless, it is essential to practice caution and ensure adequate ventilation when burning incense indoors to minimise potential health risks. Regular maintenance and replacement of air filters may also be necessary to mitigate the impact of incense smoke on indoor air quality.
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Air filters can reduce harmful PM2.5 concentrations
Incense burning is known to produce harmful PM2.5 concentrations, which can have a detrimental impact on human health. The good news is that air purifiers can effectively reduce these concentrations and minimize the associated health risks.
PM2.5 refers to particulate matter that is 2.5 micrometres or smaller in diameter. These tiny particles can infiltrate the body and cause damage, particularly to cardiovascular health. The American Heart Association and European Society of Cardiology recognize ambient PM2.5 as a significant risk factor for cardiovascular issues.
Air purifiers with High-Efficiency (HE) and Low-Efficiency (LE) filters have been shown to reduce indoor PM2.5 concentrations. In a study conducted in Detroit, HE and LE filters lowered mean indoor PM2.5 concentrations by 60% and 52%, respectively, compared to having no filtration. Personal PM2.5 exposures were also reduced by 53% and 31%, respectively.
Additionally, air purifiers can effectively remove PM2.5 produced by incense burning. A study by Chen et al. (2013) and Huang & Tai (2008) found that air purifier efficiency in reducing PM2.5 concentrations from incense burning ranged from 43.48% to 83.98%. This demonstrates that air purifiers are a valuable tool for maintaining indoor air quality and reducing potential health hazards.
It is worth noting that the quality of incense can also impact the amount of PM2.5 produced. Some users have reported that higher-quality Japanese incenses burn cleaner and do not trigger optical sensors on air purifiers as much as cheaper alternatives. Therefore, investing in higher-quality incense and ensuring proper ventilation can also help reduce PM2.5 concentrations.
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Frankincense has medicinal value and helps reduce anxiety
Frankincense, also known as olibanum, is a common type of essential oil used in aromatherapy. It is obtained from the resin of the Boswellia tree, which is native to the dry, mountainous regions of India, Africa, and the Middle East. Frankincense has a woody, spicy smell and can be inhaled, applied to the skin, or taken as a supplement. It has a long history of use in traditional medicine, and modern research has validated some of its purported health benefits.
One of the most well-known benefits of frankincense is its ability to reduce anxiety and stress. Studies have shown that compounds in frankincense, such as incensole and incensole acetate, can activate specific ion channels in the brain, leading to anxiolytic and antidepressant effects. In one study, mice exposed to burning boswellia resin incense exhibited antidepressive behaviours. Additionally, frankincense has been found to reduce heart rate and high blood pressure, which can further contribute to a calming and relaxing effect.
Frankincense is also praised for its anti-inflammatory properties. It contains terpenes and boswellic acids, which are potent anti-inflammatory agents. These compounds may help manage conditions such as arthritis, asthma, and other inflammatory diseases. For example, a 2014 study found that oral and topical application of boswellic acid reduced cartilage loss and joint lining inflammation in osteoarthritis in mice. Similarly, a randomized, double-blind, placebo-controlled study showed that B. serrata extract reduced pain and joint swelling in patients with knee osteoarthritis.
Frankincense is believed to have additional medicinal properties, including potential anticancer effects. A study on people with brain tumours found that high doses of boswellic acid extract helped reduce brain edema and lowered the need for regular medication. Boswellia extract has also been found to improve symptoms in people with inflammatory gut conditions such as ulcerative colitis and irritable bowel syndrome (IBS). Furthermore, frankincense is used to treat respiratory conditions such as asthma, sinusitis, and bronchitis, as it may help prevent the constriction of bronchial muscles.
While frankincense offers these potential health benefits, it is important to note that burning incense can produce smoke and particulate matter that may affect air quality. Some individuals have reported that burning incense has discoloured their air filters or triggered optical sensors in air purifiers. Therefore, it is recommended to ensure adequate ventilation when burning incense and to follow general safety guidelines for its use.
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Japanese incense burns cleaner than other incense
Incense has been an integral part of Japanese culture for over a thousand years. It was introduced to the country from China in the 6th century as a part of Buddhist customs. Today, Japanese incense is used in temples, tea ceremonies, incense ceremonies, and casually.
Japanese incense typically produces less smoke compared to other types of incense, making it a more comfortable option for indoor use. The higher quality Japanese incenses burn the cleanest and do not trigger optical air quality sensors. The smoke from Japanese incense is also easier to clean up, as the ash produced is usually minimal.
The difference in smoke production can be attributed to the ingredients and construction of Japanese incense. Japanese incense is traditionally made without a wooden core, resulting in a softer stick than other styles from South Asia. It is typically made from wood powder, fragrant/essential oils, resins, herbs, tree barks, and aromatics such as agarwood, sandalwood, cinnamon, cloves, patchouli, and benzoin. The ingredients are formed into a paste, which is then turned into sticks and dried.
In contrast, Indian incense uses a bamboo centre, which burns more intensely and produces more smoke. Chinese incense can be similar in composition to Japanese incense but is often longer in length and may also have a bamboo core.
The subtle and less smoky scent of Japanese incense makes it a popular choice for those seeking a more discreet and comfortable incense experience.
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Frequently asked questions
Burning incense produces particulate matter, gas products, and organic compounds. Incense smoke contains higher particulates per gram burned compared to cigarettes. The gas products from burning incense include CO, CO2, NO2, SO2, and others. Incense burning also produces volatile organic compounds, such as benzene, toluene, and xylenes, as well as aldehydes and polycyclic aromatic hydrocarbons (PAHs). The air pollution in and around various temples has been documented to have harmful effects on health, including respiratory system dysfunction.
Incense smoke is a major source of indoor air pollution and is considered one of the most hazardous air pollutants. It can accumulate indoors, mix with indoor dust, and be embedded in building materials, furniture, carpets, and upholstery. These deposited harmful residues are known as third-hand smoke.
To reduce the negative impact of incense smoke, it is recommended to use air cleaning products such as portable high-efficiency particulate air (HEPA) filters, which can effectively reduce indoor air pollution levels. However, HEPA-based multilayer filtration can be expensive due to high maintenance costs.
Some people believe that burning certain types of incense, such as frankincense, can provide medicinal value and help reduce anxiety. The incensole acetate from frankincense has been found to activate the brain's TRPV3 channels, potentially resulting in anxiolytic and anti-depressant effects.
