Community | August 02, 2008 | 11 comments

Burning joss sticks causes cancer just like smoking, study shows

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LindseyIndigo
Burning joss sticks fills the air with cancer-causing toxins that are every bit as deadly as traffic fumes and cigarette smoke, according to a study in Thailand.

Dr Manoon Leechawengwong, who has just completed a two-year study of temple workers tasked with clearing the smouldering sticks, found the cocktail of chemicals in the smoke put them at risk of leukaemia, lung, blood and bladder cancers.

“One joss stick creates the same amount of cancer-causing chemicals at one cigarette,” said Dr Manoon, who led the research. “I knew there would be some carcinogens, but I was surprised by the levels.”

Joss sticks are a type of incense used in worship in many Asian countries. In Buddhism they are believed to aid spiritual communication and serve as an offering.

Dr Manoon’s study was conducted among 40 workers in three temples at Ayutthaya, Chachoengsao and Samut Prakan, sites chosen deliberately far from Bangkok’s traffic pollution. The findings were compared with another 25 people living in a joss-stick free environment.

Temple workers were exposed to high levels of benzene, also known as petroleum ether, related to leukaemia; butadiene involved in blood cancer; and benzo[a]pyrene that can cause lung, bladder and skin cancers.

The level of benzene in the temple workers was four times higher than normal, butadiene was 260 times higher, and benzo[a]pyrene - the most dangerous carcinogen - 63 times greater.

Analysis of the temple workers blood and urine samples discovered damage to their DNA, with a correspondingly lower capacity of their bodies to repair that damage.

“We know from our study that there’s DNA damage,” said Dr Manoon. “But what we don’t know is if they will develop cancer. Certainly they have a greater risk. It’s like smoking. Not all smokers get cancer, it’s about 20% .”

Should incense sticks carry a health warning just like cigarettes? Has your valiant attempt to quit smoking been thwarted by the ill effects of your hippy joss stick habit?

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