Food shoppers are confronted with an extensive amount of information. Most often, consumers focus mainly on the price, brand, the type and extent of nutrition offered, and, potentially other food production or processing attributes, such as kosher or organic certifications. In most developed countries, it is taken for granted that the human and pet foods available for sale are safe for consumption. However, this is not always the case. Every week, news reports detail new cases of food contamination, usually from microbes (especially bacteria and viruses) but also from a variety of parasitic, chemical, or physical contaminants such as plastics or metals.