
Incense is made from a variety of natural materials, including sage, resins, oils, and wood, and has been used for thousands of years for hygienic, spiritual, and health purposes. However, recent studies have suggested that burning incense can have adverse effects on human health, particularly respiratory health. This paragraph will explore the potential negative impacts of incense smoke on lung function and respiratory health, as well as the associated risks.
| Characteristics | Values |
|---|---|
| Incense smoke contains | Particulate matter, carbon monoxide, volatile organic compounds (VOCs), musk ketones, musk xylenes, musk ambrette, aldehydes, polycyclic aromatic hydrocarbons (PAHs), diethylphthalate, nitrogen dioxide, sulfur dioxide, formaldehyde, oxides of nitrogen, benzene |
| Health effects | Irritation of eyes, nose and throat, contact dermatitis, respiratory symptoms, asthma, headaches, exacerbation of cardiovascular disease, changes in lung cell structure, inflammation, lung irritation, reduced work capacity, alterations in lung's defence system, hospital admissions, lung dysfunction, mortality |
| Cancer risk | Studies have shown a correlation between incense use and cancer, but it is not clear if incense causes cancer. The largest study so far found that incense use is safe in normal amounts and the risk of cancer is very small, if at all. |
| Other effects | A 2020 study found that burning incense may cause issues with brain health in older adults, including delays in cognitive performance and decreased brain connectivity. |
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What You'll Learn
- Incense smoke contains particulate matter that can be inhaled and cause respiratory problems
- Burning incense increases levels of polycyclic aromatic hydrocarbons (PAHs) linked to cancer
- Studies show a correlation between incense use and lung cancer, but causation is unclear
- Incense smoke contains toxic compounds like carbon monoxide, formaldehyde, and nitrogen dioxide
- Indoor incense burning is associated with increased respiratory symptoms, especially in children

Incense smoke contains particulate matter that can be inhaled and cause respiratory problems
Incense is a smoke-emitting substance, and as with any other smoke, it can be accidentally inhaled. Incense smoke contains particulate matter, which has been linked to respiratory problems.
Multiple studies have indicated the negative effects of incense burning on the respiratory system. A study among 4000 school children in Hong Kong from 2012 to 2014 showed that exposure to incense burning adversely affected lung function and lung function development. Another study that analysed data from an asthma-screening program for adolescents in Taiwan found that around 71% of the students were likely exposed to incense burning at home. A multivariable linear regression analysis showed that lung functions were significantly decreased among students with daily exposure to incense burning compared to those not exposed.
Furthermore, incense burning has been reported to generate larger quantities of particulate matter of ≤ 2.5 μm diameter, which remains in the air for hours. These fine particles have been associated with increased hospital admissions, respiratory symptoms, and lung dysfunction.
The pollutants emitted from incense burning, such as volatile organic compounds, musk ketones, musk xylenes, musk ambrette, aldehydes, polycyclic aromatic hydrocarbons (PAHs), and diethylphthalate (DEP), are toxic to the lungs and can cause an inflammatory response in human lung cells.
Burning incense indoors increases the levels of PAHs, which have been linked to cancer, specifically upper respiratory tract carcinomas and lung carcinomas.
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Burning incense increases levels of polycyclic aromatic hydrocarbons (PAHs) linked to cancer
Burning incense has been a common practice for thousands of years, with many cultures burning it for hygienic, spiritual, and health purposes. However, recent studies have revealed potential health drawbacks, particularly concerning respiratory health and cancer risks.
One of the main concerns is the emission of particulate matter, which can be easily inhaled and impact the respiratory system. These particles can be as small as a few hundred nanometers, known as ultrafine particles, which have been linked to increased hospital admissions, morbidity, and mortality due to respiratory issues and cardiovascular diseases.
In addition to particulate matter, burning incense also releases volatile organic compounds (VOCs), such as benzene, aldehydes, and polycyclic aromatic hydrocarbons (PAHs). PAHs are formed during the incomplete combustion of organic materials, and their levels can be up to 27 times higher indoors than outdoors after burning incense. Studies have found that incense burning increases the levels of PAHs in homes, and these chemicals have been linked to cancer.
While the link between incense and cancer is not yet definitive, multiple studies have found an association between incense use and an increased risk of cancer, particularly of the upper respiratory tract and lungs. The largest study to date, involving 61,000 people in Singapore, concluded that incense use is generally safe in normal amounts, but there may be a small risk of cancer with heavy incense use.
To mitigate potential health risks, it is recommended to reduce or limit incense use and exposure to its smoke. Proper ventilation during and after burning incense is also important to lower the concentration of harmful particles and gases.
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Studies show a correlation between incense use and lung cancer, but causation is unclear
Incense has been used for thousands of years for various purposes, including spiritual and hygienic reasons. However, recent studies have suggested that burning incense can have adverse health effects, particularly on the respiratory system. While the evidence is not entirely conclusive, a growing body of research indicates a correlation between incense use and lung cancer.
A 2021 study found that incense smoke induces oxidative stress, which disrupts the integrity of bronchial epithelial barriers and leads to airway hyperresponsiveness in mouse lungs. This suggests that incense smoke can negatively impact lung function. Several epidemiological studies have also reported associations between incense burning and respiratory problems, including increased risks of bronchitis, bronchiolitis, pneumonia, and wheezing.
In a study of school children in Hong Kong, it was found that daily exposure to incense burning negatively impacted lung function development. Similarly, a comparison between temple workers and church workers in Taiwan revealed that temple workers, who were exposed to incense burning, exhibited higher rates of chronic respiratory symptoms such as cough, phlegm, and dyspnea. These findings provide further evidence of the potential correlation between incense use and respiratory issues.
While these studies indicate a link between incense use and respiratory health problems, it is important to note that the specific causal mechanisms are not yet fully understood. The complex mixture of gaseous and particulate products in incense smoke makes it challenging to isolate the exact health effects of individual components. Additionally, the impact of incense smoke may vary depending on factors such as frequency of exposure, duration of exposure, and individual health conditions.
Furthermore, it is worth mentioning that the largest study examining the link between incense use and cancer, involving 61,000 people in Singapore, concluded that incense use is generally safe in normal amounts, and the risk of cancer is very small, if at all. This study highlights the importance of considering the dose-response relationship and the potential for threshold effects in assessing the health risks associated with incense use.
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Incense smoke contains toxic compounds like carbon monoxide, formaldehyde, and nitrogen dioxide
Incense smoke contains a variety of toxic compounds, including carbon monoxide, formaldehyde, and nitrogen dioxide, which can be harmful to human health. Incense burning has been associated with a range of adverse health effects, including irritation to the eyes, nose, and throat, respiratory symptoms, asthma, headaches, and exacerbation of cardiovascular disease.
The pollutants emitted from burning incense can cause an inflammatory response in human lung cells, leading to potential changes in lung cell structure and function. Multiple studies have indicated the negative effects of incense burning on respiratory health, with evidence of increased hospital admissions, morbidity, and mortality due to respiratory problems.
In a study of school children in Hong Kong, it was found that exposure to incense burning adversely affected lung function and development. Similarly, data from Taiwan's asthma-screening program for adolescents revealed that daily exposure to incense burning at home was associated with a significant decrease in lung function compared to households without incense burning.
The composition of incense smoke includes particulate matter, volatile organic compounds, musk ketones, musk xylenes, musk ambrette, aldehydes, polycyclic aromatic hydrocarbons (PAHs), and diethylphthalate (DEP). These toxic compounds are released into the air during the burning of incense and can be inhaled, leading to potential health risks.
The type of incense and the method of burning can also influence the levels of toxic compounds released. For example, charcoal briquettes used to ignite and burn incense can contribute to indoor air pollution, and different types of incense sticks have been found to generate varying amounts of particle-bound PAHs and particles per gram of incense burned.
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Indoor incense burning is associated with increased respiratory symptoms, especially in children
Burning incense is a common practice in many cultures and religions. However, it is also a source of indoor air pollution, emitting fine and ultrafine particulate matter, volatile organic compounds, other gaseous compounds, and heavy metals. These pollutants can be harmful to human health, especially for those who spend a lot of time indoors, such as children.
Several studies have found associations between incense burning and respiratory symptoms, especially in children. For example, a study by Yang et al. surveyed 4,164 elementary school children in rural Taiwan and found that incense burning was significantly associated with cough symptoms. Another study by Wang et al. reported that frequent burning of Chinese incense is associated with asthma in adolescents. Similarly, Hsu et al. found that children exposed to incense burning in damp houses are at an increased risk of asthma or allergies, especially if there is a family history.
The smoke released from burning incense contains particulate matter that can be easily inhaled and may have negative health outcomes. This particulate matter has been linked to respiratory diseases such as asthma and chronic inflammation in the body. It can also contain toxic and irritant compounds, including polycyclic aromatic hydrocarbons (PAHs), which have been associated with an increased risk of cancer, especially in the upper respiratory tract and lungs.
While the precise mechanisms behind the health effects of incense burning are still being studied, it is clear that indoor incense burning is associated with increased respiratory symptoms, especially in children. To reduce potential health risks, it is recommended to limit exposure to incense smoke, especially for children, and to ensure proper ventilation when burning incense indoors.
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Frequently asked questions
Incense smoke contains particulate matter, volatile organic compounds, musk ketones, musk xylenes, musk ambrette, aldehydes, polycyclic aromatic hydrocarbons, and diethylphthalate, which are toxic to the lungs and can cause respiratory problems.
Incense smoke has been linked to an increased risk of developing asthma, bronchitis, bronchiolitis, pneumonia, and wheezing. It can also cause respiratory dysfunction, irritation of the eyes, nose, and throat, contact dermatitis, headaches, and exacerbation of cardiovascular disease.
Yes, long-term incense smoke exposure may cause issues with brain health in older adults, including delays in cognitive performance and decreased brain connectivity.
A study of 61,000 people in Singapore found that incense use is generally safe in normal amounts, and the risk of cancer is very small, if at all. However, burning incense indoors increases the levels of chemicals called polycyclic aromatic hydrocarbons (PAHs), which have been linked to cancer.
Some alternatives to incense include using essential oils, scented candles, or diffusers with your favorite fragrances. These options may provide similar aromatic benefits without the same level of smoke exposure associated with burning incense.











































