So it turns out the chicken you get in Subway might not be 100% chicken - especially if you order it in Canada.
A report by the Canadian Broadcasting Corporation (CBC) has found the meat only contains about 53% of DNA from actual chicken. The rest of the DNA pertains to soy products.
The findings came as part of an in-depth investigation into fast food chains in Canada, such as McDonald's and Wendy's, but it was the results from Subway which the researchers said were the most surprising.
Subway have disputed this in a statement on Twitter:
The sandwich chain, which has become one of the world's most popular fast-food brands over recent years, has vowed to look into the matter.
Other broadcasters, such as CBS, have previously criticised the content of Subway's food, claiming it isn't as fresh as the company claims.