human
I've heard that there is a lot of lead in canned food. Is this true?
assistant
Yes, it is true. Lead is used to line the inside of cans and can linings are made from materials such as tin, copper, aluminum, or steel. The lining material is then coated with a thin layer of paint. This coating helps prevent corrosion and also provides an attractive finish to the product. However, if the paint is scratched or chipped away, the underlying metal will be exposed and may corrode over time.