carcinogen

Most people light candles to create a relaxing atmosphere, but what if that cozy glow is polluting the very air you’re breathing? Many candles—especially the cheap, scented ones—can release toxins that build up in your home over time, turning your peaceful ritual into a hidden health hazard.

The biggest culprit is paraffin wax, a petroleum byproduct commonly used in mass-market candles. When burned, paraffin can emit harmful chemicals like toluene and benzene—both known carcinogens. If you’re lighting candles daily or in poorly ventilated spaces, these emissions can contribute to respiratory issues, headaches, or worsen conditions like asthma.

But it doesn’t stop there. Artificial fragrances and dyes in scented candles often contain phthalates, which are linked to hormone disruption. When heated, these compounds can break down and release into the air, where they’re inhaled or absorbed through the skin. Some wicks also contain trace amounts of heavy metals like lead (less common today, but still found in some imported products), which can add another layer of toxicity to the mix.

Even the soot from a burning candle can be problematic. It might look harmless, but that black residue can settle on walls, furniture, and lungs. Over time, this indoor air pollution can accumulate—especially in homes with limited airflow or frequent candle use.

If you love candlelight, there are safer alternatives. Look for candles made with beeswax, soy, or coconut wax, using 100% cotton or wooden wicks, and scented with essential oils. Or try LED flameless candles for ambiance without the air quality risk.

Not all candles are created equal. If you wouldn’t knowingly breathe in car exhaust or spray chemicals in your living room, it might be time to rethink the candles you burn. Your lungs will thank you.