It was reported recently that Chinese authorities kept concerns about the safety of a Shanghai dairy’s products a secret for a year. Food safety authorities in Shanghai found contamination in Shanghai Panda Dairy Co. Ltd. products last February and started investigations. Chinese authorities said the dairy company was one of 22 that produced tainted milk in 2008. The company was selling milk powder and condensed milk tainted with the industrial chemical melamine, which can cause kidney stones and kidney failure. China enacted a food safety law early last year promising tougher penalties for makers of tainted products that also says authorities should immediately inform the public when food products have been found unsafe for consumption. The company was allowed to resume production after it pledged to improve safety standards.