Jessie Taylor
Candles are a common household item, with many people being unaware of the potential health effects of the chemicals released when they are burned. In recent years, there has been concern over whether scented candles, particularly those made from paraffin wax, can cause cancer. Paraffin wax is a by-product of petroleum, coal, or shale oil, and it has been found to contain toxic chemicals such as benzene, formaldehyde, and toluene, which are known carcinogens. However, experts suggest that the amount of these chemicals released by scented candles is not enough to cause cancer. While research suggests that candle burning is safe, there are still potential health risks associated with indoor air pollution and respiratory issues.
| Characteristics | Values |
|---|---|
| Cancer-causing agents | Toluene, benzene, formaldehyde, carbon dioxide |
| Health effects | Headaches, nausea, dizziness, insomnia, fatigue, loss of coordination, memory, and appetite |
| Occasional candle-burning | No danger |
| Proper use | Trimming the wick, keeping them in well-ventilated areas |
| High-quality candles | Safer |
| Cheap candles | More dangerous chemicals |
| Paraffin wax | Derived from petroleum, coal, or shale oil |
| Alternatives | Soy, stearin, beeswax, vegetable waxes, coconut wax |
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What You'll Learn
Paraffin candles emit harmful substances
Paraffin wax is a by-product of gas, oil, petroleum, coal, or shale oil refineries. When burned, paraffin wax releases carbon dioxide and other harmful substances, such as benzene and formaldehyde, which are known to be carcinogens. Toluene, another toxic chemical released by paraffin wax, can affect the central nervous system in the brain, causing headaches, nausea, dizziness, and insomnia.
According to a study sampling 500,000 Americans across 116 cities, prolonged exposure to soot particle matter—a natural byproduct of incomplete combustion in candles—increases the risk of dying from lung cancer and other heart and lung diseases.
However, some experts argue that the amount of chemicals released by scented candles is not enough to cause cancer. A peer-reviewed study published in 2014 found that even after four hours of continuous burning, the levels of potentially cancer-causing chemicals were less than half of the recommended indoor air-quality limits set by the World Health Organization. The study authors concluded that "under normal conditions of use, scented candles do not pose known health risks to the consumer."
Similarly, another study in the Journal of Regulatory Toxicology and Pharmacology found that using scented candles with paraffin wax under normal conditions does not pose any health risks. It is important to note that proper use of scented candles, such as trimming the wick and ensuring good ventilation, can also reduce potential risks.
While the evidence on the cancer-causing effects of paraffin candles is mixed, it is clear that burning paraffin wax releases harmful substances. Consumers concerned about the potential health and environmental impacts of paraffin wax may consider alternative options such as soy, stearin, vegetable waxes, or beeswax candles.
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The dangers of indoor air pollution
Indoor air pollution is a serious issue that can have a range of negative health effects. One source of indoor air pollution that has recently come under scrutiny is paraffin candles. Paraffin wax is derived from petroleum, coal, or shale oil, and as a result, it contains a number of potentially harmful chemicals. When burned, paraffin candles release toxic chemicals such as toluene and benzene, which are known carcinogens. Toluene affects the central nervous system and can cause headaches, nausea, dizziness, and insomnia. Benzene has also been linked to an increased risk of cancer.
In addition to the direct health risks associated with paraffin candles, there are also indirect risks related to indoor air pollution. The combustion of paraffin wax releases carbon dioxide and other harmful substances, contributing to poor indoor air quality. Prolonged exposure to soot particles, for example, has been linked to an increased risk of lung cancer and other heart and lung diseases.
While the research on the cancer-causing effects of candles is still ongoing, some scientists and doctors have expressed concern. Dr Sobia Farooq, a pulmonologist, has stated that paraffin wax could emit dangerous chemicals, although these claims have not been proven to have adverse health effects. Toxicologist Yvonne Burkart has also gone viral for claiming that scented candles cause cancer and allergies, although another toxicologist has disputed this, saying that the amount of chemicals released is not enough to cause harm.
Despite the concerns, some studies have found that when used correctly, scented candles do not pose a cancer risk. A 2014 peer-reviewed study, for example, found that even after four hours of continuous burning, the levels of potentially cancer-causing chemicals like benzene and formaldehyde were less than half of the recommended indoor air-quality limits. Another study in the Journal of Regulatory Toxicology and Pharmacology came to a similar conclusion, finding no health risks when scented candles with paraffin wax were used under normal conditions.
To minimise the potential risks associated with indoor air pollution from candles, it is recommended to invest in high-quality candles, burn them in well-ventilated areas, and trim the wicks regularly to prevent the release of toxic substances. Consumers are also advised to choose reputable brands that use safe fragrance oils and plant-based waxes, ensuring stable burning without producing black smoke.
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The carcinogenic effects of soot
Paraffin wax is a by-product of gas, oil, and shale refineries, and is derived from petroleum. It is a common material used in candle-making due to its low cost. However, concerns have been raised about the potential health risks associated with burning paraffin candles, including the release of toxic chemicals and the production of soot.
One study sampling 500,000 Americans across 116 cities found a correlation between prolonged exposure to soot particles and an increased risk of lung cancer, as well as other heart and lung diseases. This suggests that the carcinogenic effects of soot are particularly relevant to the respiratory system.
The production of soot from candles can be influenced by various factors, including the type of wax used and the quality of the candle. For example, soy candles have been shown to produce less soot than paraffin candles, indicating that the choice of wax can play a role in reducing soot emissions.
Additionally, proper use and ventilation are crucial in mitigating the potential risks associated with candle soot. Trimming the wick of a candle, for instance, can help prevent the formation of a "mushroom head," which, when burned, can release toxic substances. Burning candles in well-ventilated spaces can also reduce the concentration of emissions, thereby lowering the potential health risks.
While the specific carcinogenic effects of soot from paraffin candles require further research, current evidence suggests that prolonged exposure to soot can increase the risk of lung cancer. Therefore, it is important to take precautionary measures when using candles, such as ensuring proper ventilation and choosing candles made from alternative wax bases, like soy or beeswax, which have been shown to produce less soot.
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Cancer risk from scented candles
There is much debate about the potential carcinogenicity of scented candles, particularly those made from paraffin wax. Paraffin wax is a by-product of petroleum, coal, or shale oil, and it is commonly used to make candles due to its low production cost.
The Case for Cancer Risk
Some studies and experts have warned about the potential dangers of scented candles, especially those made from paraffin wax. Toxicologist Yvonne Burkart claimed that scented candles, particularly those made from cheap wax, emit cancer-causing chemicals like formaldehyde and benzene. Burkart's claims were based on a 2021 study that found candles made from paraffin wax, palm oil, and animal fat emitted similar levels of formaldehyde. Formaldehyde and benzene are recognized by the US as cancer-causing agents. Another study by researchers at South Carolina State University found that burning paraffin wax candles releases harmful chemicals like toluene and benzene into the air. Toluene can affect the central nervous system, causing headaches, nausea, dizziness, and insomnia.
The Case against Cancer Risk
However, other experts and studies refute the claim that scented candles cause cancer. Dr. Sobia Farooq, a pulmonologist at Cleveland Clinic, stated that there is "no imminent danger" from scented candles, as long as people invest in high-quality candles and use them in well-ventilated areas. Hans Plugge, a toxicologist and principal at Safer Chemical Analytics, agreed that the amount of formaldehyde released by candles is not enough to cause cancer. A peer-reviewed study published in 2014 found that even after four hours of continuous burning, the levels of potentially cancer-causing chemicals like benzene and formaldehyde were less than half of the recommended indoor air-quality limits set by the World Health Organization. The authors of this study concluded that "under normal conditions of use, scented candles do not pose known health risks to the consumer." This conclusion is supported by a study in the "Journal of Regulatory Toxicology and Pharmacology," which found that scented candles with paraffin wax used under normal conditions do not pose any health risks.
Alternative Health Concerns
While the evidence for a direct link between scented candles and cancer is inconclusive, there are other potential health concerns associated with their use. Some people, especially those with asthma or allergies, may be sensitive or allergic to certain fragrances in scented candles, experiencing irritation such as a runny nose or sneezing. Burning candles can also contribute to indoor air pollution and increase room humidity. Additionally, the unvented combustion of any material, including candles, releases compounds known to cause cancer. Therefore, ensuring proper ventilation when burning candles is crucial to reducing potential emissions and lowering health risks.
While there may be some valid concerns about the potential health risks associated with scented candles, particularly those made from paraffin wax, the weight of evidence suggests that their occasional and proper use does not cause cancer. However, it is always advisable to choose reputable brands, follow safety guidelines, and ensure adequate ventilation when burning any type of candle.
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Safe alternatives to paraffin candles
Paraffin wax is a by-product of gas and oil refineries and has been linked to several health issues. Researchers at South Carolina State University found that burning paraffin wax candles releases harmful chemicals like toluene and benzene, which are known carcinogens. Prolonged exposure to soot particles from candles has also been associated with an increased risk of lung cancer and other heart and lung diseases.
Beeswax Candles
Beeswax candles are a natural, non-toxic alternative to paraffin candles. They are made from beeswax, which is a natural and sustainable wax. Beeswax candles burn cleaner than paraffin candles and produce fewer harmful byproducts. They are also known for their air-purifying properties.
Soy Candles
Soy candles are made from soy wax, which is a natural and renewable wax derived from soybeans. Soy candles are a biodegradable alternative to paraffin candles and produce a cleaner burn. They have a lower melting point, which allows for a longer burn time and better scent throw. Soy wax is also free of the potentially toxic chemicals found in paraffin wax.
Coconut Wax Candles
Coconut wax candles are another natural and eco-friendly alternative to paraffin candles. Coconut wax is derived from coconut oil and burns cleaner than paraffin wax, producing fewer harmful byproducts. Coconut wax candles also have a longer burn time and better scent throw compared to paraffin candles.
Essential Oils and Sustainable Materials
When choosing candles, look for brands that use 100% essential oils for fragrance instead of artificial scents, which can release additional harmful chemicals. Also, opt for candles made from sustainable materials and natural ingredients to ensure a safer and more beneficial experience, especially if you are interested in aromatherapy.
Making the switch to these safer alternatives can help reduce your exposure to potentially toxic chemicals and create a healthier and more environmentally friendly space in your home.
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Frequently asked questions
Paraffin wax is derived from petroleum, coal, or shale oil and has been found to contain toxic chemicals such as benzene, formaldehyde, and toluene. These chemicals are known carcinogens. However, the amount of these chemicals released by scented candles is not enough to cause cancer. Research suggests that with typical use, the dose of chemicals is far below harmful levels.
Burning paraffin candles can release harmful substances such as carbon dioxide, benzene, and formaldehyde, posing subtle threats to health. Prolonged exposure to soot particles from candles has been linked to an increased risk of lung cancer and other heart and lung diseases. Additionally, toluene, found in paraffin wax, can affect the central nervous system, causing headaches, nausea, dizziness, insomnia, fatigue, loss of coordination, memory issues, and loss of appetite.
Yes, there are several alternatives to paraffin candles that are considered safer and more sustainable options. These include soy, stearin, vegetable waxes (such as soy and coconut), and beeswax candles. These alternatives are naturally sourced and do not contain the same toxic chemicals as paraffin wax.
To reduce potential risks, it is recommended to use candles in well-ventilated spaces, trim the wick regularly to prevent the formation of a "mushroom head," and choose reputable fragrance brands that use safe ingredients. Additionally, burning candles for shorter durations and in larger spaces can help reduce the concentration of harmful emissions.
