Question: is heinz mustard gluten free?
Answer: Heinz. In the U.S. and the U.K., all varieties of Heinz mustard are considered gluten-free to 20 ppm, according to the company's gluten-free product list. In Canada, only Heinz Yellow Mustard is considered gluten-free. Heinz reports that it uses corn, not wheat, as the source for its vinegar.