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Governments have agreed the first international standards limiting cancer-causing arsenic pollution in rice, a key move to protect consumers of what is a staple food for billions, the UN said.
The Codex Alimentarius Commission, the top decision-making body for global food standards, issued the decision at its annual meeting in Geneva.
"Arsenic is an environmental contaminant. It occurs naturally and is taken up by plants from the water and soil when they're growing, in particular rice," said World Health Organisation food safety coordinator Angelika Tritscher.
The commission set a maximum of 0.2 milligrams of arsenic per kilo of polished rice - the product that is traded and consumed.
"The main driver for Codex standards is trade. But when we talk about safety standards, the main purpose is clearly to protect the health of consumers," said Tritscher.

	It’s not like you have an immediate, acute effect, like with salmonella

	ANGELIKA TRITSCHER
Arsenic occurs in the earth's crust. Some of the heaviest concentrations are in Asia, where rice is a mainstay.
A key problem is paddy fields irrigated with water pumped from shallow wells containing arsenic-rich sediments.
Heavy rice consumption has been found to compound the impact of arsenic in drinking water.
"Since rice is a very important staple food for many countries and many regions of the world, a significant part of the global population is affected," Tritscher said.
Bangladesh has been a top concern, with tens of millions of rural dwellers exposed via wells drilled in the 1970s in "access-to-water" programmes. Parts of China, Cambodia, India and Vietnam have also been affected.
Long-term exposure can cause cancer and skin lesions, Tritscher said. It is also linked to heart disease, diabetes and damage to the nervous system and brain.
Arsenic rarely grabs headlines in the same way as other food crises. "It's not like you have an immediate, acute effect like you have with a salmonella outbreak," said Tritscher.
The 186-nation Codex commission is run by the WHO and fellow UN agency the Food and Agriculture Organisation.
Its standards must be set down into national laws to take effect.
"We all expect our food to be safe and of good quality. We don't expect to get sick from our food," said senior FAO food standards officer Tom Heilandt.
The rice decision followed years of research which fed into a policy-making process helmed by China and Japan.
"One of the core principles of Codex standards is that they are science-based," Tritscher said.
"The outcome of the assessments was that you cannot define a safe exposure level. The consequence is that you have to try to reduce exposure as much as possible," she added.
"We operate on the 'alara' principle - as low as reasonably achievable - which balances how low you can go without having to discard the majority of the food supply."
The commission also set out ways to reduce arsenic levels.
They include growing crops in raised beds instead of flooded fields, drying out paddies before harvest, and regular checks on water supplies.


Governments agree to limit levels of cancer-causing arsenic in rice

Chinese farmers plant rice seedlings in a paddy field. Photo: Xinhua

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World

Governments agree to first international limit on cancer-causing contaminant found in food that is staple for billions around the world


Governments have agreed the first international standards limiting cancer-causing arsenic pollution in rice, a key move to protect consumers of what is a staple food for billions, the UN said.


Governments agree to limit levels of cancer-causing arsenic in rice

.css-1c6uqr6{color:inherit;font-weight:inherit;font-size:inherit;font-family:inherit;line-height:inherit;overflow-wrap:break-word;}Governments agree to first international limit on cancer-causing contaminant found in food that is staple for billions around the world

Governments agree to first international limit on cancer-causing contaminant found in food that is staple for billions around the world