Love lighting a scented candle to add cozy ambiance on dreary days? Choose wisely—some popular scents carry unexpected health risks.
Citrus-scented candles can harm indoor air quality
These candles often contain limonene, a compound safe in solid form. But when exposed to air, it transforms into formaldehyde, a respiratory irritant also found in certain citrus cleaners. Research from the University of York's National Centre for Atmospheric Science highlights this issue.
Why your home amplifies the risk
Experts note two key concerns: limonene levels in candles are far higher than previously estimated, and modern homes are so well-insulated that ventilation is minimal. This traps formaldehyde indoors, potentially causing sore throats, stinging eyes, coughing, and nosebleeds. Long-term effects remain under study.
Expert tips for healthier indoor air
