Seamus Hammond
Burning incense is a practice with a long history, stretching back thousands of years. It is used for a variety of reasons, from spiritual purposes to hygiene, and is particularly common in Asian countries where Buddhism and Taoism are mainstream religions. However, recent studies have revealed some surprising health risks linked to burning incense, which have caused concern about the potential negative impact of inhaling incense.
| Characteristics | Values |
|---|---|
| Health risks | Asthma, cancer, hypertension, developmental delays, inflammation, cardiovascular diseases, respiratory problems, and worsening brain health |
| Composition | Particulate matter, gas products, organic compounds, calcium carbonate, carbon monoxide, sulfur dioxide, formaldehyde, nitrogen dioxide, polycyclic aromatic compounds, volatile organic compounds |
| Health drawbacks | Oxidative stress, DNA damage, respiratory system dysfunction, air pollution, exposure to toxic chemicals |
| Safety | Not officially deemed a major public health risk, but recent studies suggest otherwise |
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What You'll Learn
- Incense smoke contains particulate matter, which can be inhaled and may have negative health outcomes
- Burning incense may cause issues with brain health in older adults
- Incense smoke has been associated with an increased risk of heart disease
- Incense smoke may cause respiratory issues
- Burning incense indoors may increase levels of volatile organic compounds
Incense smoke contains particulate matter, which can be inhaled and may have negative health outcomes
The composition of incense smoke includes gaseous and particulate products, with the gaseous phase containing carbon dioxide, carbon monoxide, sulfur dioxide, formaldehyde, nitrogen dioxide, and volatile organic compounds (VOCs). The particulate matter in incense smoke is of particular concern due to its potential health risks. While there have been no direct reports of the ill effects of incense smoke particles on human health, the complex mixture of pollutants in incense smoke has been associated with negative health outcomes.
The health effects of incense smoke inhalation are comparable to or even more harmful than passive smoking. Studies have found links between incense smoke exposure and increased risks of respiratory problems, cardiovascular diseases, and even cancer. The largest study on incense use and cancer tracked 61,000 people in Singapore and concluded that incense use is generally safe in normal amounts, with a very small or negligible risk of cancer. However, burning incense indoors increases the levels of polycyclic aromatic hydrocarbons (PAHs), which are known carcinogens.
To reduce the potential health risks associated with incense burning, it is recommended to limit exposure by reducing the duration of incense burning, choosing natural plant-based incense, ensuring adequate ventilation or using an air purifier, or burning incense outdoors.
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Burning incense may cause issues with brain health in older adults
Burning incense emits smoke and particulate matter that can be easily inhaled. While incense is not deemed a major public health risk, studies suggest that it can pose certain health dangers.
One of the potential dangers of inhaling incense smoke is its impact on brain health, particularly in older adults. Several studies have found that indoor incense burning may negatively affect cognitive functions and brain functional connectivity in older adults. The studies suggest that incense burning induces functional changes in the brain, which can reduce cognitive resilience and increase vulnerability to future cognitive decline. This can manifest as delays in cognitive performance and a decrease in brain connectivity.
The mechanisms underlying these relationships are not yet fully understood, and more research is needed to establish a direct link between incense burning and cognitive and brain health issues. However, it is hypothesized that the negative effects may be due to the air pollution caused by incense burning, which can result in smaller brain and prefrontal cortex volumes.
The potential health risks associated with incense burning are particularly relevant for older adults, given the high prevalence of vascular burden in this population. As a result, indoor incense burning should be practised with caution, and safer alternatives should be considered to mitigate potential negative impacts on brain health in older adults.
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Incense smoke has been associated with an increased risk of heart disease
Incense smoke contains fine particles that are less than 2.5 μm in diameter. These fine particles can penetrate deep into the human respiratory system and accumulate, leading to potential health risks. The gaseous phase of incense smoke consists of carbon dioxide, carbon monoxide, sulfur dioxide, formaldehyde, nitrogen dioxide, polycyclic aromatic compounds, and volatile organic compounds (VOCs). Exposure to these chemicals can have harmful effects on the respiratory system, including the lungs.
The effects of incense smoke on cardiovascular health may be due to the presence of carbon monoxide and nitrogen dioxide in the smoke. Carbon monoxide reduces the blood's capacity to transport oxygen, leading to potential health issues. Nitrogen dioxide exposure has been linked to reduced work capacity, aggravation of existing cardiovascular diseases, effects on pulmonary function, respiratory illnesses, lung irritation, and alterations in the lung's defense system.
In addition to the impact on the respiratory and cardiovascular systems, incense smoke has also been associated with an increased risk of heart disease. Studies suggest that incense smoke can trigger chronic inflammation in the body, which may affect heart tissues and deposit harmful substances. Temple workers exposed to incense smoke were found to have increased levels of oxidative DNA damage, which can have detrimental effects on health.
While the direct link between incense smoke and heart disease requires further investigation, the available evidence suggests that burning incense may contribute to an increased risk of cardiovascular issues. It is important for individuals to be aware of the potential health risks associated with incense smoke exposure and take necessary precautions to minimize their exposure or opt for healthier alternatives.
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Incense smoke may cause respiratory issues
The gaseous products from burning incense include carbon monoxide (CO), carbon dioxide (CO2), nitrogen dioxide (NO2), and sulfur dioxide (SO2). Inhalation of carbon monoxide can cause headaches, dizziness, weakness, and nausea, while high concentrations can be fatal. Exposure to sulfur dioxide and nitrogen dioxide can lead to reduced work capacity, aggravation of cardiovascular diseases, adverse effects on pulmonary function, respiratory illnesses, lung irritation, and changes in the lung's defense system.
Additionally, incense smoke releases volatile organic compounds (VOCs) such as benzene, formaldehyde, and polycyclic aromatic hydrocarbons (PAHs). These compounds are associated with increased levels of air pollution and can have harmful effects on respiratory health. A study evaluating children found an association between incense burning and asthma or asthma-like symptoms. Another study suggested that incense smoke can trigger chronic inflammation in the body and lungs, which can contribute to respiratory problems.
While the use of incense in normal amounts is generally considered safe, burning incense may still pose health risks, especially for individuals with respiratory illnesses. It is recommended that those with respiratory conditions like asthma or COPD avoid places where incense is burned indoors.
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Burning incense indoors may increase levels of volatile organic compounds
Burning incense releases smoke, which contains particulate matter, gas products, and organic compounds. These compounds include volatile organic compounds (VOCs) such as benzene, toluene, and xylenes, as well as aldehydes and polycyclic aromatic hydrocarbons (PAHs). The release of these compounds during indoor incense burning can lead to increased levels of toxic chemicals like VOCs in the surrounding environment.
VOCs are organic compounds that have a high vapour pressure and can easily become vapours or gases. They are typically classified into two categories: regulatory VOCs and hazardous air pollutants. Some VOCs, such as benzene, are known to have adverse health effects. The presence of these compounds in incense smoke has been linked to respiratory issues and an increased risk of cancer, especially for squamous cell lung cancer and upper respiratory cancers.
The impact of indoor incense burning on VOC levels was highlighted in a study published in The International Journal of Environmental Research and Public Health. The study found that burning incense indoors resulted in elevated levels of benzene, formaldehyde, and other VOCs, exceeding the limits recommended by the World Health Organization (WHO). This indicates that indoor incense burning can significantly contribute to the concentration of VOCs in enclosed spaces.
It is important to note that the health effects of incense smoke are complex and influenced by various factors. The composition of incense smoke includes both gaseous and particulate components, making it challenging to isolate the impact of VOCs specifically. However, the presence of VOCs in indoor environments is a concern due to their potential health risks, particularly for individuals with respiratory conditions or compromised immune systems.
To mitigate the potential risks associated with indoor incense burning, it is advisable to reduce exposure by limiting the burning time, choosing natural plant-based incense, ensuring adequate ventilation, or burning incense outdoors. Exploring healthier alternatives, such as essential oils, can also help improve indoor air quality and minimise potential health risks associated with elevated VOC levels.
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Frequently asked questions
Yes, incense smoke contains particulate matter, gas products, and organic compounds that can be harmful when inhaled.
Inhaling incense smoke has been linked to respiratory problems, cardiovascular disease, asthma, cancer, and developmental delays in infants. It can also cause headaches, dizziness, weakness, and nausea.
Yes, if you are concerned about the risks of incense, you can explore alternatives such as essential oils or plant-based incense. You can also reduce your exposure by limiting the amount of time you burn incense, using adequate ventilation, or burning it outdoors.
Burning incense indoors can result in high levels of benzene, formaldehyde, and other volatile organic compounds (VOCs). It can also increase air pollution and contribute to poor air quality.
While there is some conflicting evidence, studies suggest that long-term exposure to incense smoke may increase the risk of cancer, especially lung and upper respiratory cancers. However, one large study found that incense use is safe in normal amounts and the risk of cancer is very small.
