Subway, the world's biggest sandwich chain, said it was in the process of removing a chemical called azodicarbonamide from its bread, the Associated Press reported.
Subway's announcement came a day after popular food blogger, Vani Hari, started a petition on her website foodbabe.com asking Subway to stop using the chemical in their bread.
In her petition, Hari said the chemical Subway used in their bread was the same chemical used to make yoga mats, shoe soles, and other rubber-based objects.
She also stated that the chemical which Subway used to produce its bread faster and cheaper, was banned all over the world as it was linked to asthma, allergies, respiratory problems, and in some cases, cancer.
Within 24 hours, the online petition received 50,000 signatures.