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Feb. 7, 2014 -- A chemical called azodicarbonamide will be removed from bread used in Subway sandwich shops, according to the company.

This week, popular food blogger Vani Hari started a petition asking Subway to stop using the ingredient. The operator of said Subway uses azodicarbonamide in its bread "as a bleaching agent," and noted that the chemical is also used to make yoga mats and shoe rubber, the Associated Press reported.

The chemical was being phased out before the petition was launched, according to Subway, which did not specify when the change began or would be finished.

"The complete conversion to have this product out of the bread will be done soon," the company said in a statement, the AP reported.

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