Candles set the mood for cozy nights and romantic dinners, but are they safe to burn indoors? For years, warnings about toxic chemicals in candles have sparked concern. However, new research suggests that most of these fears may be overblown, allowing you to enjoy candles with less worry.
The Truth About Toxic Chemicals
In 2009, a study raised alarms about paraffin wax candles, which release chemicals like toluene and benzene during burning. (ref) These substances can be harmful at high concentrations, but experts agree that household candles emit far lower levels than what poses a risk.
A 2014 study measured air quality after burning candles for four hours and found that even in smaller rooms, chemical levels were only half the safety limits set by the World Health Organization. (ref) While burning multiple candles in poorly ventilated areas can slightly increase exposure, normal use in ventilated spaces is considered safe.
What About Soot?
Scented candles tend to burn with more soot because fragrance additives alter the way the wax combusts. Soot, made of carbon particles, can stain walls or furniture but is not a major health concern.
To minimize soot production, keep wicks trimmed to about 15mm and ensure the wax pool is free of debris. Wicks also play a role; look for 100% cotton or organic cotton wicks to reduce emissions and avoid synthetic blends.
Environmental Impact of Candles
Paraffin wax, a common ingredient in candles, is a byproduct of oil refining and contributes to climate change. Soy and beeswax candles are popular alternatives with lower environmental impact, but they’re not perfect.
Soy farming is linked to deforestation and heavy pesticide use, while beeswax is considered an animal byproduct and avoided by many vegans. (ref) To further reduce waste, choose candles in glass containers that are easier to recycle or upcycle.
For example, you can reuse jars for storage or refill them with wax. Brands like Old Pine Candle Co even collect used jars to create new candles, offering a more sustainable solution. (ref)
Choosing Safer, Greener Candles
For healthier and more eco-friendly options, look for candles made from soy, beeswax, or other vegetable-based waxes. Essential oil-scented candles are better for those sensitive to artificial fragrances, which can irritate some people or trigger asthma.
Be cautious of misleading labels like “natural” or “green,” as these terms are not regulated. Instead, seek brands known for sustainability, such as Hyggelight or Sanari Candle, which prioritize eco-friendly practices.
Enjoy Without Worry
Burning candles occasionally in a well-ventilated space is not a significant health concern. Research shows that exposure to emissions from household candles is minimal compared to everyday pollutants like vehicle exhaust. (ref)
You can enjoy the warmth and ambiance of your favorite candles with peace of mind, knowing that the risk is low and manageable. Just make thoughtful choices to reduce environmental impact and create a safer, more enjoyable experience.
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Davin is a jack-of-all-trades but has professional training and experience in various home and garden subjects. He leans on other experts when needed and edits and fact-checks all articles.