Food safety in China continues to be a concern as more and more overseas foodstuffs continue to enter the American consumer market.

The food safety regulator in Shenzhen said it had found excessive levels of aflatoxin in peanuts sold in three stores, and in cooking oil in four restaurants, the official Xinhua news agency said late Friday.

Milk was at the centre of one of China’s biggest food safety scandals in 2008 when the industrial chemical melamine was found to have been illegally added to dairy products to give the appearance of higher protein content.

At least six babies died and another 300,000 became ill after drinking milk tainted with the chemical.