Definition: Foda, or Food Detergent, was a substance made by the Roman Empire during the reigns of Augustus and Quintus Fabius Maximus. It was made of sulfur dioxide (FeSO4) with some other substances like charcoal (CaCO3). These compounds were used to clean food before it was put in the oven. The word "foda" itself comes from Latin, meaning 'to be kept clear' or 'to keep away from.' The term came into use in Roman times but became more widespread after the Christianization of the Empire.