Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Geoduck
In December 2013, China imposed a ban on geoduck and other "double-shell aquatic animals"—such as clams, oysters, mussels, and scallops—that were imported from the west coast of the United States. Chinese officials found in an Alaskan shipment high levels of saxitoxin, a natural product that certain shellfish can accumulate, which when eaten by humans, can cause paralytic shellfish poisoning resulting in severe illness or even death. Companies exporting the product claim that Chinese inspectors were using a standard more rigorous than necessary to be considered safe for human consumption. A shipment from Washington state was high in arsenic. The ban was in place for less than 6 months, ending in May 2014.