
Burning incense is a common practice in many cultures, with incense sticks, cones, or coils being the most popular methods. However, the burning of incense releases smoke and chemicals, including volatile organic compounds (VOCs) and particulate matter (PM), which can have negative health effects. While high-quality natural incense used in moderation is considered relatively safe, recent studies have linked indoor incense burning to poor air quality and increased levels of toxic chemicals, posing potential health risks such as respiratory issues, asthma, and even cancer. Charcoal incense, in particular, has been a topic of concern due to the release of carbon monoxide, a colorless, odorless, and poisonous gas. While the amount of charcoal used in incense burning is typically small, proper ventilation is crucial to mitigate potential health hazards.
Is burning incense charcoal toxic?
| Characteristics | Values |
|---|---|
| Air quality | Poor air quality linked to incense burning |
| Respiratory health | Linked to respiratory issues such as asthma and increased risk of respiratory cancers |
| Brain health | Associated with worse cognitive performance and decreased brain connectivity in older adults |
| Heart health | Linked to an increased risk of heart disease |
| Cancer risk | Contains carcinogens and increases cancer risk |
| Toxic chemicals | Releases volatile organic compounds (VOCs) and particulate matter (PM) |
| Carbon monoxide | Releases carbon monoxide, a colorless, odorless, and poisonous gas |
| Other health effects | May cause eye, nose, and throat irritation, headaches, nausea, dizziness |
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What You'll Learn
- Burning incense charcoal releases toxic chemicals, including volatile organic compounds (VOCs)
- Incense smoke may cause respiratory issues and increase the risk of asthma and lung cancer
- Incense smoke is linked to worse cognitive performance and decreased brain connectivity
- Incense burning is associated with an increased risk of heart disease
- Burning incense charcoal indoors may facilitate the transmission of viruses, including SARS-CoV-2

Burning incense charcoal releases toxic chemicals, including volatile organic compounds (VOCs)
Burning incense is a common practice in many parts of the world, especially in the Eastern regions, for various purposes, including hygienic, aromatherapy, and spiritual reasons. However, recent research has revealed some health drawbacks associated with the practice.
The use of charcoal in burning incense, such as oudh or bakhoor, increases the release of toxic chemicals. A greater amount of charcoal results in larger and longer emissions. The charcoal used in burning incense can also release carbon monoxide, a colorless, odorless, and poisonous gas. While burning a small amount of charcoal for incense may not cause issues, it is important to ensure proper ventilation in the room.
In addition to VOCs, the particulate matter (PM) released by burning incense, wood, and candles can also be harmful. Fine particles released into the air, especially those smaller than 2.5 μm, are known to cause lung and respiratory illnesses above certain concentrations. The smoke released by burning incense may also contain irritants and carcinogens, which can lead to respiratory diseases and increase the risk of cancer.
Recent studies have also found associations between incense burning and adverse effects on brain health. A 2020 study showed that burning incense indoors was linked to worse cognitive performance and decreased brain connectivity in older adults. Furthermore, some toxic chemicals in incense smoke have been associated with intellectual decline, accelerated cognitive aging, and an increased risk for Alzheimer's Disease and vascular dementia.
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Incense smoke may cause respiratory issues and increase the risk of asthma and lung cancer
Burning incense is a common practice in many parts of the world, with a variety of commercially available forms, including charcoal incense. While incense burning has been a traditional practice in some religions and cultures, recent research reveals some potential health drawbacks.
The smoke released from burning incense contains fine particles that are easily inhaled and can cause respiratory issues. These particles are known as particulate matter (PM) and are smaller than 10 μm, with specific concern for those smaller than 2.5 μm as they can cause lung and respiratory illnesses above certain concentrations. The smoke from incense burning has been linked to increased levels of toxic chemicals called volatile organic compounds (VOCs), which are associated with a range of health problems. These compounds can cause eye, nose, and throat irritation, headaches, nausea, dizziness, and can exacerbate asthma. Long-term exposure to VOCs has also been linked to various forms of cancer.
A 2020 study found that burning incense may cause issues with brain health in older adults, including delays in cognitive performance and a decrease in brain connectivity. This could be due to the release of toxic chemicals in incense smoke, which have been associated with intellectual decline and an increased risk for Alzheimer's Disease and vascular dementia.
Additionally, a study evaluating children showed an association between incense burning and asthma or asthma-like symptoms. The smoke from burning incense contains various irritants and carcinogens, which could lead to respiratory diseases and trigger asthma attacks. While high-quality natural incense used in moderation may pose minimal health risks, it is important to be cautious and ensure proper ventilation when burning incense indoors.
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Incense smoke is linked to worse cognitive performance and decreased brain connectivity
Burning incense is a common practice in many parts of the world, especially in the Eastern regions, for various purposes, including hygienic, aromatherapy, meditation, deodorant, and spiritual purposes. However, recent studies have shown that incense smoke is linked to worse cognitive performance and decreased brain connectivity.
A 2020 study by Wong A, et al. found that burning incense is associated with cognitive issues and decreased brain connectivity in older adults over 65 years of age. The study tested 515 older adults and found that those exposed to indoor incense burning on a weekly basis had worse cognitive performance and decreased brain connectivity after three years. This could be due to the long-term air pollution caused by incense burning, resulting in smaller brain and prefrontal cortex volumes.
The specific toxic chemicals in incense smoke that are associated with these adverse effects include benzene, formaldehyde, and other volatile organic compounds (VOCs). These compounds are released into the air when incense is burnt, and their levels can be higher than the limits recommended by the World Health Organization (WHO). VOCs are chemicals that have low boiling points and evaporate easily at room temperature. They can cause eye, nose, and throat irritation, headaches, nausea, vomiting, dizziness, and can exacerbate asthma.
Additionally, the particulate matter in incense smoke contains carcinogens and irritants, which could lead to respiratory diseases and an increased risk of cancer, especially of the upper respiratory tract and lungs. The smoke released from burning incense also contains carbon monoxide, which is a colorless, odorless, and poisonous gas. While burning a small amount of charcoal to release incense fragrance is generally safe, burning larger quantities of charcoal indoors can be dangerous due to the risk of carbon monoxide poisoning.
While the precise mechanisms behind the link between incense burning and brain health require further investigation, the current evidence suggests that incense smoke contains overlooked health dangers. Consumers should be cautious about the potential health risks associated with burning incense and consider alternative options to improve the scent of indoor spaces, such as essential oils.
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Incense burning is associated with an increased risk of heart disease
Incense burning has been a common practice in many cultures and religions for thousands of years. It is used for various purposes, including divine worshipping, meditation, aromatherapy, and even as a deodorant. However, recent research has revealed some potential health drawbacks associated with incense burning.
One of the main concerns is the presence of particulate matter in incense smoke, which can be easily inhaled and lead to negative health outcomes. This particulate matter contains carcinogens and irritants, which have been linked to an increased risk of respiratory diseases such as asthma and respiratory allergies. Additionally, incense smoke has been associated with an increased risk of heart disease.
Several studies have found a positive association between incense burning and cardiovascular issues. A cross-sectional study conducted among Thai-Vietnamese adults aged 35 and above showed a link between household incense burning and carotid artery intima-media thickness (CIMT), which is a measure of atherosclerosis and an estimate of the risk of cardiovascular diseases (CVDs). The study suggested that incense burning at home may be a contributing factor to the development of cardiovascular conditions.
Furthermore, a large cohort study of middle-aged and elderly Chinese individuals in Singapore found that long-term daily exposure to incense burning was associated with a 12% increased risk of cardiovascular mortality compared to former or non-users. The study also reported a 10% and 19% increased risk for coronary heart diseases and stroke, respectively. These findings provide strong evidence of a causal relationship between incense smoke exposure and cardiovascular issues.
The potential mechanisms underlying the association between incense burning and heart disease include oxidative stress and inflammation. Exposure to incense smoke has been found to increase the levels of various chemokines and inflammatory mediators in heart tissues, which may contribute to vascular oxidative stress and inflammation. Additionally, incense smoke contains pollutants such as carbon monoxide, carbon dioxide, sulfur dioxide, and nitrogen dioxide, which can have detrimental effects on cardiovascular health.
In conclusion, while incense burning has been a traditional practice in many cultures, recent evidence suggests that it may pose a risk to cardiovascular health. Further research is needed to fully understand the mechanisms and implications of incense burning on heart disease risk. In the meantime, it is essential to consider the potential health risks associated with incense burning and take appropriate precautions to ensure safe use.
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Burning incense charcoal indoors may facilitate the transmission of viruses, including SARS-CoV-2
While incense burning has been a traditional practice in many cultures and religions, recent research has highlighted potential health risks associated with indoor incense use. In addition to the increased transmission of viruses, burning incense indoors has been linked to poor air quality and the release of toxic air pollutants. Studies have found concerning levels of pollutants, such as benzene and formaldehyde, which exceed the guidelines recommended by the World Health Organization.
Furthermore, incense smoke contains toxic and irritant compounds, including particulate matter that can be easily inhaled. This particulate matter has been confirmed to be carcinogenic, increasing the risk of upper respiratory tract carcinomas and lung carcinomas. Incense smoke has also been associated with respiratory issues, such as asthma, and an increased risk of heart disease.
The use of charcoal-based incense may pose additional risks. Charcoal incense often uses synthetic fragrance oils, which can contain potentially harmful dilutants. Additionally, charcoal combustion can create microparticles, especially if the combustion is incomplete, leading to the release of smoke and potentially harmful pollutants.
To mitigate the health risks associated with burning incense charcoal indoors, it is recommended to improve ventilation by opening windows or burning incense outdoors. Limiting the amount of time or size of burning incense can also help reduce exposure to harmful pollutants.
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Frequently asked questions
Burning incense releases toxic chemicals, which, if inhaled in large quantities, are bad for you. Charcoal used in burning incense increases the release of these chemicals. Charcoal can also give off carbon monoxide, which is poisonous. However, since only a small amount of charcoal is needed to burn incense, the risk of toxicity is low.
Burning incense has been associated with an increased risk of asthma, cancer, and heart disease. It has also been linked to worse cognitive performance and decreased brain connectivity.
Essential oils are a healthier option to make your home smell nice.
Incense comes in various forms, including sticks, cones, coils, powders, rope, rocks, charcoal, and smudge bundles.




















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