. >> karen everstein is a scientist at usp, the group sets standards for foods. on her watch list, processed foods. >> source ingredients from all over the world and putting them together into a finished food product. this increases the opportunities for fraud. >> reporter: like frozen pizza that can add dozens of ingredients. usp created a database for companies looking to prevent fraud. >> reporter: you can quickly identify which ingredients are prone to fraud and what have been used and which of those might be hazardous. >> reporter: according to the fda combating food fraud is the responsibility of both industry and regulatory authorities. the fda inspects manufacturers to make sure they are meeting requirements for good manufacturing practices and also conducts label reviews during these inspections. and the usda tells us it, quote, works every day at establishments ensuring that meat, poultry and processed egg products entering commerce are safe, wholesome and correctly labeled. and both experts say the bottom line is to try to stick with brands that you tr