What is iron oxide?
Iron oxide is a type of synthetic color additive. (1)
Iron oxide, in its natural form, is known as iron rust. (1)
What does iron oxide do?
used to impart a reddish color to food – and paint. (1)
Resources
1. https://www.dogfoodadvisor.com/dog-food-reviews/ol-roy-dog-food-canned/
