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The Daily Insight

Is it OK to burn candles

Author

John Parsons

Updated on April 25, 2026

Burning a candle releases chemicals that can be potentially dangerous to human health. However, there isn’t any definitive research showing that exposure to candle smoke increases your risk of developing any health condition. Inhaling any type of smoke can be unhealthy.

What candles are safe to burn?

  • coconut wax.
  • beeswax.
  • soy wax.
  • palm wax.
  • vegetable wax.

Are candles bad for your lungs?

Burning candles releases volatile organic compounds and particulate matter into the air. Particulate matter is a mixture of extremely small liquid droplets and particles that can enter your lungs. There’s concern that extended exposure to particulate matter can lead to heart and lung problems.

Is it bad to burn candles for hours?

If you burn your candle for more than 4 hours at a time, carbon collects on the wick, and it begins to “mushroom.” This causes the wick to become unstable, the flame gets too large and your candle smokes too much, which releases that dangerous soot into the air and all collects all around your candle container.

What is the healthiest candle to burn?

If you want to light a clean burning candle, select one of the best following some basic guidelines. Look for a candle that will affect your air quality the least. Soy candles, beeswax candles, and vegetable-wax based candles that are 100% (not blended with paraffin) are your best options.

Can I leave a candle burning all night?

It is safe and advisable to not leave a candle burning unattended, even for a short period of time, for the risks we mentioned above. As a general rule of thumb, candles can be burnt, if attended, for not more than four hours. If they are burnt for more than four hours, you may encounter the mushroom wick issue.

Why can't you burn a candle for more than 4 hours?

If you burn your candle for more than 4 hours at a time, carbon will collect on the wick, and your wick will begin to “mushroom.” This can cause the wick to become unstable, the flame to get too large, your candle to smoke, and soot to be released into the air and around your candle container.

Do candles clean the air?

Beeswax or soy candles. These candles burn cleaner than regular paraffin wax. Beeswax candles clean the air by releasing negative ions into the air which bind with toxins and help remove them from the air.

When should you stop using a candle?

Stop using your candle when there’s half an inch of wax left at the bottom. If you keep burning your candle past the half-inch mark, the flame will get too close to the base of the jar and might cause heat damage to the surface the candle is resting on and to the jar itself.

Are wax melts safer than candles?

Wax melts are safer than scented candles Elements such as lead, phthalates, and formaldehyde. Those things are released into your air and left on your walls along with the black soot from the burning wick. Scented candles can be toxic, wax melts are not.

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Are candles as bad as cigarettes?

Andrew Sledd, a pediatrician with a specialty in Environmental Toxicology, told KFVS12 that one hour of scented candle burning can be the equivalent of smoking a single cigarette. Soot from candles can also pose a real threat to our respiratory systems, he said.

Where should you not put a candle?

Remember to keep candles away from drafts, high traffic areas, pets and children. Also avoid placing lit candles near curtains, under shelves or cabinetry, or on the floor. Candles should be placed on a stable, heat resistant surface.

What makes a candle toxic?

Toxins in Scented Candles Most candles are made of paraffin wax (a petroleum waste product that is chemically bleached), which creates highly toxic benzene and toluene (both are known carcinogens) when burned. … As candles burn, phthalates are released into the air where they may be inhaled or absorbed through the skin.

Do candles make your ceiling black?

Candles can actually leave gray, soot deposits on surfaces, according to Bob Schacke with Home Inspection Experts . You might notice it on the ceiling, walls, or around picture frames. … “The jug limits air flow to the flame and this inhibits combustion, causing extra soot.”

What is the proper way to light a candle?

  1. Trim the wick. Every. …
  2. Let the wax melt all the way across. Once your candle’s lit, DON’T blow it out until the top layer of wax has melted all the way across. …
  3. Buy multi-wick candles. …
  4. Keep the flame away from moving air. …
  5. Dip your wicks to extinguish the flame.

Where does the wax go when you burn a candle?

When candles burn, most of their matter goes into the air. The light and heat from a candle comes from the wax burning. When you light the wick, the flame causes some of the wax to melt, flow up the wick and evaporate, and then the wax vapor burns.

Do candles produce carbon monoxide?

Carbon monoxide is a byproduct of incomplete combustion of just about anything that burns. All flames produce some amount of carbon monoxide. This includes cigarettes and cigars, pipe tobacco, candles, gas stoves, gas ovens, gas space heaters, gas fireplaces and gas furnaces.

Can a candle in a glass jar start a fire?

Can a candle in a glass jar start a fire? … The glass prevents the open flame from reaching any flammable objects and setting your house on fire. Even then, make sure to keep the candle at least 1 foot away from any curtains or other items that might catch fire.

Can glass candles explode?

Glass doesn’t crack or break very easily. It requires high temperatures to break. Therefore, candles are made in glass jars. When a candle burns, the center part of the wax gets heated up first.

How do you prevent a sinkhole from a candle?

  1. Heating the glass before pouring. As the wax cools, it contracts and holds onto the wick and the glass, thus creating the cavity. …
  2. Poking relief holes as the candle is cooling also helps to prevent the air pockets from forming.

How long should you burn a scented candle for?

Heyen recommends not burning your candle for longer than four to six hours at a time. “You want to prevent your candle from overheating,” Heyen says. “If you let the whole candle get liquid, the wick or wicks can float to the side, and it’s going to burn unevenly after that,” she says.

Why is it good to burn candles?

Scented candles can induce calm and help to alleviate symptoms of stress, with the ability to lower cortisol. Certain candles are crafted specifically to activate chemicals in the brain, like serotonin and dopamine, to support a positive mood.

Why is it good to light candles?

“The soothing effect that candles have is based on how the brain processes smells. The smell of scented candles stimulates our limbic system, the part of the brain that is home to our memory and emotions. Hormones like serotonin and dopamine can be produced to help regulate mood.

Does burning candles get rid of dust?

The results are cleaner air and a yummy smelling home. Beeswax candles are often helpful for those with asthma or allergies and effectively remove common allergens like dust and dander from the air. Beeswax candles also burn more slowly than paraffin candles so they last much longer.

Are Yankee candles toxic?

All of their wicks are made from pure cotton and are thus completely safe. They use fragrance extracts and real essential oils to scent their candles. A direct call to the company confirmed that Yankee uses refined paraffin wax in their candles.

Are wax cubes better than candles?

1. Have a longer burn time than candles. Wax melts absorb heat slower than traditional candles and therefore are able to release aromas without burning the oils. This gives the wax the ability to continue releasing the fragrance without the scent evaporating quickly.

Are Yankee candle wax melts toxic?

Yankee Candles are another popular choice for wax melts, but unfortunately they’re also a bit toxic. Just like Scentsy, they use paraffin wax, fragrance oils, and D&C coloring in their products.

Can burning candles cause black soot?

Surprisingly, the source of the soot most often is simple candle-burning. Burning candles can be extremely dirty, especially scented ones. Although they appear to burn cleanly, they produce tiny particles of soot that become airborne. … Air typically is pulled from the garage into the house, bringing the soot with it.

Are Sand and Fog candles toxic?

Do they contain paraffin or chemicals? We have 100% soy wax candles under our Natural Home brand. We have soy blend candles for Sand + Fog. … No peer-reviewed scientific study has ever proven that candle wax emissions are harmful to human health.

What happens when you inhale candle smoke?

As candles or incense burn, tiny particles smolder and flake off into the air. When this soot is inhaled, it can get into the airways and lungs, possibly causing irritation. This can worsen asthma symptoms. You may come across candles labelled as “soot-free,” but there is no such thing as a soot-free candle.

Can you fall asleep with candles lit?

If you sleep with a candle lit, the vast majority of the time, nothing will happen. But just on occasion, a candle will fall over or get knocked over, stay lit, and set something on fire. When that happens, fires can easily get out of control, and people could end up dead.