Researchers at the State Institute of Serology in Copenhagen from 1993 to 1998 surveyed 61 Singaporean Chinese, aged 000 to 45, who did not show signs of cancer for the use of incense sticks. The interviewed volunteers were followed up to 74.
After adjusting for other risk factors, such as smoking, it was found that frequent long-term inhalation of incense smoke almost doubles the risk of developing all types of upper respiratory tract cancer and squamous cell lung cancer. Irregular use of incense is not associated with this risk.
Incense sticks in the smoke are thought to be responsible for the development of cancer. such as polyaromatic hydrocarbons, carbonyl compounds and benzene.
Based on the findings, study leader Jeppe Friborg recommends against using incense sticks regularly, especially in residential and poorly ventilated areas.
Now scientists are figuring out which of the incense can be considered the least harmful.
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