washington a new research has revealed that coating the mouth with bpacontaining food, like soup, does not lead to higher than expected levels of bpa in blood.bpa, also known as bisphenol a, is used to make some plastics and to seal canned food containers against bacterial contamination and food, which picks up trace amounts of bpa from packaging, is the major source of human exposure.health concerns about bpa center on its potential to mimic certain hormones at really high exposures, but within the last month, the european food safety authority and the us food and drug administration reaff