Tainted foods offer more than a taste of toxin by Alice So
Wednesday, December 14, 2011
Two-thirds of food samples tested by the Centre for Food Safety were found to contain a pollutant that may cause cancer and damage the immune system.
But the center said the average monthly consumption of the chemical - dioxin - is just 22 units, well below the permissible level of 70.
Mandarin fish, oysters and pomfret were found to contain the highest levels of dioxin and dioxin-like polychlorinated biphenyls, or PCBs.
Among all food groups, fish and seafood and products made from them contained the highest level.
This was followed by eggs and their products, fats and oils, and meat, poultry and game and their products.
A total of 142 samples were tested to determine the dietary exposure of the population to the substances and to assess the associated health risks.
Testing was done on 71 different types of food purchased and cooked from June to November last year out of a total of 426 individual food samples taken.
Food safety officer (risk assessment) Xiao Ying said: "Dioxins persist in the environment and bioaccumulate in the food chain.
"High concentrations of such toxins are found in food of animal origin - meat, dairy products, eggs and fish."
The main sources of these substances are environmental contaminants, she noted.
Dioxin is created through industrial processes and the burning of waste while PCBs are manufactured for use as coolants and insulating fluids.
Center consultant Philip Ho Yuk-yin said those in general are unlikely to experience serious health issues from the chemicals.
"I suggest Hongkongers trim the fat from meat and consume low-fat dairy products, while avoiding excessive consumption of a narrow range of food items," he said.
"It is key to have a balanced diet, which includes a wide variety of fruits and vegetables."
Ho added that consuming a moderate amount of a variety of fish is important and recommended.
Fish contains many essential nutrients, such as Omega-3 fatty acids and high-quality proteins, he added.
http://www.thestandard.com.hk/news_deta ... 11214&fc=4