Tesco says it will now introduce a "comprehensive system of DNA testing across our meat products."
The supermarket giant says it's taking action to show its customers that they can trust the quality of its food.
"We want to leave customers in no doubt that we will do whatever it takes to ensure the quality of their food and that the food they buy is exactly what the label says it is", Tesco's Technical Director Tim Smith said.
More top news
The US Navy says 10 sailors are missing and five are injured after the USS John S. McCain collided with a merchant ship near Singapore
The Crown Prosecution Service says the internet has provided "new platforms for offending behaviour"
A Public Health England report estimated 150,000 to 200,000 Britons are infected with the virus by imported pork every year.