U.S. foodmaker H.J. Heinz Co. said on Tuesday it will tighten controls over ingredients suppliers in China after it was forced to recall some infant food products from Chinese store shelves due to excess levels of lead.

The company, known globally for its ketchup and baked beans, made the annoucement as it sought to contain the potential damage to its reputation in a country where consumers are highly sensitive to food safety after a series of high-profile scares.

Heinz told Reuters on Monday that it had recalled four batches of its AD Calcium Hi-Protein Cereal for infants after a food watchdog in eastern China found levels of the toxic heavy metal above regulation standards.