The scientist warned about the danger of aromatic candles

Burning candles can significantly worsen indoor air quality by releasing ultrafine particles capable of penetrating deep into the lungs. According to experts, these substances are linked to inflammatory processes and an increased risk of developing a number of diseases, including cancer.

As reported by TUT.AZ with reference to The Conversation, this was stated by researcher Karin Laursen from Aarhus University. As part of their experiments, scientists conducted a comparative analysis of the impact of burning candles and cooking on indoor air. The results were alarming: both sources release polluting particles, however, the concentration from burning candles was several times higher.

Of particular concern is the size of these particles. Those produced by burning candles measure only 7–8 nanometers — compared to approximately 80 nanometers from cooking. Such microscopic particles freely penetrate the lung alveoli, and from there enter the bloodstream and spread throughout the entire body.

But that's not all. In addition to soot, nitrogen dioxide and polycyclic aromatic hydrocarbons are detected in the air — compounds that, according to scientists, are comparable in their level of impact to pollution from diesel engine exhaust. To reduce risks, experts recommend lighting candles as rarely as possible, reducing their number, and making sure to ventilate the room.