Adulteration is the practice of adding unsafe amounts of chemical preservatives to foods and drinks, or adding color to conceal inferior or deteriorated food and drink products, or mixing inexpensive foods and drinks with expensive ones so as to reduce costs, or substituting inexpensive foods and drinks for expensive ones. Adulteration has played a large role in the history of American food and drink; the public’s demand for federal protection from unscrupulous and dishonest producers and manufacturers at the beginning of the twentieth century led to the breakthrough passage in 1906 of both the Pure Food and Drug Act and the Meat Inspection Act.